57456399 has 96 divisors (see below), whose sum is σ = 110605824. Its totient is φ = 25608960.

The previous prime is 57456397. The next prime is 57456431. The reversal of 57456399 is 99365475.

It is a Cunningham number, because it is equal to 7580²-1.

It is not a de Polignac number, because 57456399 - 2¹ = 57456397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57456397) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1084057 + ... + 1084109.

It is an arithmetic number, because the mean of its divisors is an integer number (1152144).

Almost surely, 2^57456399 is an apocalyptic number.

57456399 is a deficient number, since it is larger than the sum of its proper divisors (53149425).

57456399 is a wasteful number, since it uses less digits than its factorization.

57456399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125 (or 106 counting only the distinct ones).

The product of its digits is 1020600, while the sum is 48.

The square root of 57456399 is about 7579.9999340369. Note that the first 4 decimals coincide. The cubic root of 57456399 is about 385.8745487068.

It can be divided in two parts, 57456 and 399, that multiplied together give a square (22924944 = 4788²).

The spelling of 57456399 in words is "fifty-seven million, four hundred fifty-six thousand, three hundred ninety-nine".