57806538 has 8 divisors (see below), whose sum is σ = 115613088. Its totient is φ = 19268844.

The previous prime is 57806533. The next prime is 57806557. The reversal of 57806538 is 83560875.

57806538 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

57806538 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 57806538.

It is not an unprimeable number, because it can be changed into a prime (57806533) 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 3 ways as a sum of consecutive naturals, for example, 4817206 + ... + 4817217.

It is an arithmetic number, because the mean of its divisors is an integer number (14451636).

Almost surely, 2^57806538 is an apocalyptic number.

57806538 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

57806538 is a wasteful number, since it uses less digits than its factorization.

57806538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9634428.

The product of its (nonzero) digits is 201600, while the sum is 42.

The square root of 57806538 is about 7603.0610940594. The cubic root of 57806538 is about 386.6568010100.

The spelling of 57806538 in words is "fifty-seven million, eight hundred six thousand, five hundred thirty-eight".