56391458 has 4 divisors (see below), whose sum is σ = 84587190. Its totient is φ = 28195728.

The previous prime is 56391437. The next prime is 56391481. The reversal of 56391458 is 85419365.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 85419365 = 5 ⋅17083873.

It can be written as a sum of positive squares in only one way, i.e., 47706649 + 8684809 = 6907^2 + 2947^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14097863 + ... + 14097866.

Almost surely, 2^56391458 is an apocalyptic number.

56391458 is a deficient number, since it is larger than the sum of its proper divisors (28195732).

56391458 is a wasteful number, since it uses less digits than its factorization.

56391458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28195731.

The product of its digits is 129600, while the sum is 41.

The square root of 56391458 is about 7509.4246117795. The cubic root of 56391458 is about 383.4756342931.

The spelling of 56391458 in words is "fifty-six million, three hundred ninety-one thousand, four hundred fifty-eight".