57078393 has 4 divisors (see below), whose sum is σ = 76104528. Its totient is φ = 38052260.

The previous prime is 57078349. The next prime is 57078397. The reversal of 57078393 is 39387075.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 57078393 - 2⁸ = 57078137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (57078397) 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, 9513063 + ... + 9513068.

It is an arithmetic number, because the mean of its divisors is an integer number (19026132).

Almost surely, 2^57078393 is an apocalyptic number.

It is an amenable number.

57078393 is a deficient number, since it is larger than the sum of its proper divisors (19026135).

57078393 is a wasteful number, since it uses less digits than its factorization.

57078393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19026134.

The product of its (nonzero) digits is 158760, while the sum is 42.

The square root of 57078393 is about 7555.0243546927. The cubic root of 57078393 is about 385.0264624528.

The spelling of 57078393 in words is "fifty-seven million, seventy-eight thousand, three hundred ninety-three".