57820506 has 16 divisors (see below), whose sum is σ = 115807584. Its totient is φ = 19245744.

The previous prime is 57820471. The next prime is 57820507. The reversal of 57820506 is 60502875.

It is a happy number.

57820506 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (57820507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2176 + ... + 10971.

It is an arithmetic number, because the mean of its divisors is an integer number (7237974).

Almost surely, 2^57820506 is an apocalyptic number.

57820506 is an abundant number, since it is smaller than the sum of its proper divisors (57987078).

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

57820506 is a wasteful number, since it uses less digits than its factorization.

57820506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13885.

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 57820506 is about 7603.9796159643. The cubic root of 57820506 is about 386.6879415893.

The spelling of 57820506 in words is "fifty-seven million, eight hundred twenty thousand, five hundred six".