57106820 has 24 divisors (see below), whose sum is σ = 120873984. Its totient is φ = 22661856.

The previous prime is 57106813. The next prime is 57106823. The reversal of 57106820 is 2860175.

It is a super-2 number, since 2×57106820² = 6522377781024800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (57106823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8702 + ... + 13781.

It is an arithmetic number, because the mean of its divisors is an integer number (5036416).

Almost surely, 2^57106820 is an apocalyptic number.

It is an amenable number.

57106820 is an abundant number, since it is smaller than the sum of its proper divisors (63767164).

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

57106820 is a wasteful number, since it uses less digits than its factorization.

57106820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22619 (or 22617 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 57106820 is about 7556.9054513074. The cubic root of 57106820 is about 385.0903706450.

Adding to 57106820 its reverse (2860175), we get a palindrome (59966995).

The spelling of 57106820 in words is "fifty-seven million, one hundred six thousand, eight hundred twenty".