57283220 has 24 divisors (see below), whose sum is σ = 120784608. Its totient is φ = 22820000.

The previous prime is 57283211. The next prime is 57283243. The reversal of 57283220 is 2238275.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 686 + ... + 10725.

It is an arithmetic number, because the mean of its divisors is an integer number (5032692).

Almost surely, 2^57283220 is an apocalyptic number.

It is an amenable number.

57283220 is an abundant number, since it is smaller than the sum of its proper divisors (63501388).

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

57283220 is a wasteful number, since it uses less digits than its factorization.

57283220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11671 (or 11669 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 57283220 is about 7568.5678962403. The cubic root of 57283220 is about 385.4864711291.

The spelling of 57283220 in words is "fifty-seven million, two hundred eighty-three thousand, two hundred twenty".