57039809 has 8 divisors (see below), whose sum is σ = 57805440. Its totient is φ = 56278800.

The previous prime is 57039803. The next prime is 57039821. The reversal of 57039809 is 90893075.

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

It is a cyclic number.

It is not a de Polignac number, because 57039809 - 2¹⁶ = 56974273 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (57039803) 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, 28574 + ... + 30504.

It is an arithmetic number, because the mean of its divisors is an integer number (7225680).

Almost surely, 2^57039809 is an apocalyptic number.

It is an amenable number.

57039809 is a deficient number, since it is larger than the sum of its proper divisors (765631).

57039809 is a wasteful number, since it uses less digits than its factorization.

57039809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2311.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 57039809 is about 7552.4703905411. The cubic root of 57039809 is about 384.9396858347.

The spelling of 57039809 in words is "fifty-seven million, thirty-nine thousand, eight hundred nine".