57478393 has 8 divisors (see below), whose sum is σ = 66340800. Its totient is φ = 48778800.

The previous prime is 57478349. The next prime is 57478397. The reversal of 57478393 is 39387475.

It is a happy number.

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

It is not a de Polignac number, because 57478393 - 2⁹ = 57477881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57478397) 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, 39943 + ... + 41356.

It is an arithmetic number, because the mean of its divisors is an integer number (8292600).

Almost surely, 2^57478393 is an apocalyptic number.

It is an amenable number.

57478393 is a deficient number, since it is larger than the sum of its proper divisors (8862407).

57478393 is a wasteful number, since it uses less digits than its factorization.

57478393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81407.

The product of its digits is 635040, while the sum is 46.

The square root of 57478393 is about 7581.4505867941. The cubic root of 57478393 is about 385.9237793250.

The spelling of 57478393 in words is "fifty-seven million, four hundred seventy-eight thousand, three hundred ninety-three".