57078839 has 4 divisors (see below), whose sum is σ = 57094224. Its totient is φ = 57063456.

The previous prime is 57078823. The next prime is 57078871. The reversal of 57078839 is 93887075.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 57078839 - 2⁴ = 57078823 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 57078793 and 57078802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57078139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1679 + ... + 10815.

It is an arithmetic number, because the mean of its divisors is an integer number (14273556).

Almost surely, 2^57078839 is an apocalyptic number.

57078839 is a deficient number, since it is larger than the sum of its proper divisors (15385).

57078839 is an equidigital number, since it uses as much as digits as its factorization.

57078839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15384.

The product of its (nonzero) digits is 423360, while the sum is 47.

The square root of 57078839 is about 7555.0538714161. The cubic root of 57078839 is about 385.0274652920.

The spelling of 57078839 in words is "fifty-seven million, seventy-eight thousand, eight hundred thirty-nine".