56978493 has 16 divisors (see below), whose sum is σ = 89253696. Its totient is φ = 31875840.

The previous prime is 56978477. The next prime is 56978497. The reversal of 56978493 is 39487965.

It is not a de Polignac number, because 56978493 - 2⁴ = 56978477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56978497) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65980 + ... + 66837.

It is an arithmetic number, because the mean of its divisors is an integer number (5578356).

Almost surely, 2^56978493 is an apocalyptic number.

It is an amenable number.

56978493 is a deficient number, since it is larger than the sum of its proper divisors (32275203).

56978493 is a wasteful number, since it uses less digits than its factorization.

56978493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132844.

The product of its digits is 1632960, while the sum is 51.

The square root of 56978493 is about 7548.4099650191. The cubic root of 56978493 is about 384.8017036972.

The spelling of 56978493 in words is "fifty-six million, nine hundred seventy-eight thousand, four hundred ninety-three".