61297236 has 288 divisors, whose sum is σ = 219864960. Its totient is φ = 14696640.

The previous prime is 61297217. The next prime is 61297241. The reversal of 61297236 is 63279216.

61297236 is a `hidden beast` number, since 612 + 9 + 7 + 2 + 36 = 666.

61297236 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×61297236² = 7514702282479392, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

Its product of digits (27216) is a multiple of the sum of its prime divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 61297236.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4715166 + ... + 4715178.

It is an arithmetic number, because the mean of its divisors is an integer number (763420).

Almost surely, 2^61297236 is an apocalyptic number.

61297236 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61297236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109932480).

61297236 is an abundant number, since it is smaller than the sum of its proper divisors (158567724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61297236 is a wasteful number, since it uses less digits than its factorization.

61297236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63 (or 36 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 61297236 is about 7829.2551369846. The cubic root of 61297236 is about 394.2880643932.

The spelling of 61297236 in words is "sixty-one million, two hundred ninety-seven thousand, two hundred thirty-six".