57861916 has 48 divisors (see below), whose sum is σ = 123880960. Its totient is φ = 23094720.

The previous prime is 57861911. The next prime is 57861919. The reversal of 57861916 is 61916875.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57861911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31561 + ... + 33343.

Almost surely, 2^57861916 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 57861916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61940480).

57861916 is an abundant number, since it is smaller than the sum of its proper divisors (66019044).

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

57861916 is a wasteful number, since it uses less digits than its factorization.

57861916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1874 (or 1872 counting only the distinct ones).

The product of its digits is 90720, while the sum is 43.

The square root of 57861916 is about 7606.7020449075. The cubic root of 57861916 is about 386.7802325291.

The spelling of 57861916 in words is "fifty-seven million, eight hundred sixty-one thousand, nine hundred sixteen".