57442224 has 80 divisors (see below), whose sum is σ = 176988672. Its totient is φ = 15696384.

The previous prime is 57442219. The next prime is 57442261. The reversal of 57442224 is 42224475.

It is a junction number, because it is equal to n+sod(n) for n = 57442191 and 57442200.

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, 4012 + ... + 11444.

Almost surely, 2^57442224 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 57442224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88494336).

57442224 is an abundant number, since it is smaller than the sum of its proper divisors (119546448).

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

57442224 is a wasteful number, since it uses less digits than its factorization.

57442224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7474 (or 7468 counting only the distinct ones).

The product of its digits is 17920, while the sum is 30.

The square root of 57442224 is about 7579.0648499667. The cubic root of 57442224 is about 385.8428132128.

Adding to 57442224 its reverse (42224475), we get a palindrome (99666699).

The spelling of 57442224 in words is "fifty-seven million, four hundred forty-two thousand, two hundred twenty-four".