57216492 has 36 divisors (see below), whose sum is σ = 153139896. Its totient is φ = 17950080.

The previous prime is 57216491. The next prime is 57216499. The reversal of 57216492 is 29461275.

57216492 is a `hidden beast` number, since 5 + 7 + 2 + 1 + 649 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (57216491) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46134 + ... + 47357.

It is an arithmetic number, because the mean of its divisors is an integer number (4253886).

Almost surely, 2^57216492 is an apocalyptic number.

It is an amenable number.

57216492 is an abundant number, since it is smaller than the sum of its proper divisors (95923404).

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

57216492 is a wasteful number, since it uses less digits than its factorization.

57216492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93518 (or 93513 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 57216492 is about 7564.1583801504. The cubic root of 57216492 is about 385.3367313177.

The spelling of 57216492 in words is "fifty-seven million, two hundred sixteen thousand, four hundred ninety-two".