57816940 has 96 divisors (see below), whose sum is σ = 134830080. Its totient is φ = 20756736.

The previous prime is 57816937. The next prime is 57816961. The reversal of 57816940 is 4961875.

It is a junction number, because it is equal to n+sod(n) for n = 57816893 and 57816902.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 731821 + ... + 731899.

It is an arithmetic number, because the mean of its divisors is an integer number (1404480).

It is a vampire number, since it can be written as 6794 ⋅ 8510 (with its own digits).

Almost surely, 2^57816940 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 57816940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67415040).

57816940 is an abundant number, since it is smaller than the sum of its proper divisors (77013140).

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

57816940 is a wasteful number, since it uses less digits than its factorization.

57816940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191 (or 189 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 57816940 is about 7603.7451298686. The cubic root of 57816940 is about 386.6799919440.

It can be divided in two parts, 5781 and 6940, that added together give a palindrome (12721).

The spelling of 57816940 in words is "fifty-seven million, eight hundred sixteen thousand, nine hundred forty".