61287296 has 64 divisors (see below), whose sum is σ = 141600480. Its totient is φ = 25878528.

The previous prime is 61287287. The next prime is 61287301. The reversal of 61287296 is 69278216.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×61287296² = 7512265301983232, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64940 + ... + 65876.

Almost surely, 2^61287296 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61287296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70800240).

61287296 is an abundant number, since it is smaller than the sum of its proper divisors (80313184).

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

61287296 is an equidigital number, since it uses as much as digits as its factorization.

61287296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1031 (or 1019 counting only the distinct ones).

The product of its digits is 72576, while the sum is 41.

The square root of 61287296 is about 7828.6203126732. The cubic root of 61287296 is about 394.2667505707.

The spelling of 61287296 in words is "sixty-one million, two hundred eighty-seven thousand, two hundred ninety-six".