61904256 has 64 divisors (see below), whose sum is σ = 168916080. Its totient is φ = 20072448.

The previous prime is 61904243. The next prime is 61904257. The reversal of 61904256 is 65240916.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61904257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12030 + ... + 16386.

Almost surely, 2^61904256 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 61904256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84458040).

61904256 is an abundant number, since it is smaller than the sum of its proper divisors (107011824).

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

61904256 is a wasteful number, since it uses less digits than its factorization.

61904256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4411 (or 4399 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 61904256 is about 7867.9257749422. The cubic root of 61904256 is about 395.5853224710.

The spelling of 61904256 in words is "sixty-one million, nine hundred four thousand, two hundred fifty-six".