57291904 has 64 divisors (see below), whose sum is σ = 122442840. Its totient is φ = 26607616.

The previous prime is 57291869. The next prime is 57291911. The reversal of 57291904 is 40919275.

It can be written as a sum of positive squares in 4 ways, for example, as 31809600 + 25482304 = 5640^2 + 5048^2 .

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

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, 245772 + ... + 246004.

Almost surely, 2^57291904 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 57291904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61221420).

57291904 is an abundant number, since it is smaller than the sum of its proper divisors (65150936).

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

57291904 is a wasteful number, since it uses less digits than its factorization.

57291904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377 (or 365 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 57291904 is about 7569.1415629515. The cubic root of 57291904 is about 385.5059497557.

The spelling of 57291904 in words is "fifty-seven million, two hundred ninety-one thousand, nine hundred four".