57781296 has 80 divisors (see below), whose sum is σ = 168739200. Its totient is φ = 18925632.

The previous prime is 57781277. The next prime is 57781319. The reversal of 57781296 is 69218775.

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, 24355 + ... + 26621.

It is an arithmetic number, because the mean of its divisors is an integer number (2109240).

Almost surely, 2^57781296 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 57781296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84369600).

57781296 is an abundant number, since it is smaller than the sum of its proper divisors (110957904).

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

57781296 is a wasteful number, since it uses less digits than its factorization.

57781296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2343 (or 2331 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 57781296 is about 7601.4009235140. The cubic root of 57781296 is about 386.6005131905.

The spelling of 57781296 in words is "fifty-seven million, seven hundred eighty-one thousand, two hundred ninety-six".