57051904 has 144 divisors (see below), whose sum is σ = 146513920. Its totient is φ = 21565440.

The previous prime is 57051899. The next prime is 57051913. The reversal of 57051904 is 40915075.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 722137 + ... + 722215.

Almost surely, 2^57051904 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 57051904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73256960).

57051904 is an abundant number, since it is smaller than the sum of its proper divisors (89462016).

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

57051904 is a wasteful number, since it uses less digits than its factorization.

57051904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146 (or 132 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 31.

The square root of 57051904 is about 7553.2710794728. The cubic root of 57051904 is about 384.9668920762.

Adding to 57051904 its reverse (40915075), we get a palindrome (97966979).

The spelling of 57051904 in words is "fifty-seven million, fifty-one thousand, nine hundred four".