61263240 has 128 divisors (see below), whose sum is σ = 198288000. Its totient is φ = 15085568.

The previous prime is 61263211. The next prime is 61263269. The reversal of 61263240 is 4236216.

61263240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (61263211) and next prime (61263269).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 61263240.

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 31 ways as a sum of consecutive naturals, for example, 120106 + ... + 120614.

It is an arithmetic number, because the mean of its divisors is an integer number (1549125).

Almost surely, 2^61263240 is an apocalyptic number.

61263240 is a gapful number since it is divisible by the number (60) 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 61263240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99144000).

61263240 is an abundant number, since it is smaller than the sum of its proper divisors (137024760).

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

61263240 is a wasteful number, since it uses less digits than its factorization.

61263240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599 (or 595 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 61263240 is about 7827.0837481146. The cubic root of 61263240 is about 394.2151590079.

Adding to 61263240 its reverse (4236216), we get a palindrome (65499456).

The spelling of 61263240 in words is "sixty-one million, two hundred sixty-three thousand, two hundred forty".