57776540 has 48 divisors (see below), whose sum is σ = 129729600. Its totient is φ = 21537792.

The previous prime is 57776539. The next prime is 57776603. The reversal of 57776540 is 4567775.

It is a congruent number.

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, 36281 + ... + 37839.

It is an arithmetic number, because the mean of its divisors is an integer number (2702700).

Almost surely, 2^57776540 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 57776540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64864800).

57776540 is an abundant number, since it is smaller than the sum of its proper divisors (71953060).

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

57776540 is a wasteful number, since it uses less digits than its factorization.

57776540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1694 (or 1692 counting only the distinct ones).

The product of its (nonzero) digits is 205800, while the sum is 41.

The square root of 57776540 is about 7601.0880800054. The cubic root of 57776540 is about 386.5899058221.

The spelling of 57776540 in words is "fifty-seven million, seven hundred seventy-six thousand, five hundred forty".