57921708 has 42 divisors (see below), whose sum is σ = 146413204. Its totient is φ = 17822064.

The previous prime is 57921697. The next prime is 57921767. The reversal of 57921708 is 80712975.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a nialpdrome in base 13.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 4455510 + ... + 4455522.

Almost surely, 2^57921708 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 57921708, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73206602).

57921708 is an abundant number, since it is smaller than the sum of its proper divisors (88491496).

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

57921708 is an frugal number, since it uses more digits than its factorization.

57921708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85 (or 18 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 39.

The square root of 57921708 is about 7610.6312484576. The cubic root of 57921708 is about 386.9134139830.

The spelling of 57921708 in words is "fifty-seven million, nine hundred twenty-one thousand, seven hundred eight".