57280620 has 24 divisors (see below), whose sum is σ = 160385904. Its totient is φ = 15274816.

The previous prime is 57280583. The next prime is 57280627. The reversal of 57280620 is 2608275.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (57280627) by changing a digit.

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, 477279 + ... + 477398.

It is an arithmetic number, because the mean of its divisors is an integer number (6682746).

Almost surely, 2^57280620 is an apocalyptic number.

It is an amenable number.

57280620 is an abundant number, since it is smaller than the sum of its proper divisors (103105284).

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

57280620 is a wasteful number, since it uses less digits than its factorization.

57280620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 954689 (or 954687 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 57280620 is about 7568.3961312817. The cubic root of 57280620 is about 385.4806388220.

Adding to 57280620 its reverse (2608275), we get a palindrome (59888895).

The spelling of 57280620 in words is "fifty-seven million, two hundred eighty thousand, six hundred twenty".