56636438 has 8 divisors (see below), whose sum is σ = 85167720. Its totient is φ = 28247200.

The previous prime is 56636431. The next prime is 56636441. The reversal of 56636438 is 83463665.

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

It is a super-2 number, since 2×56636438² = 6415372218655688, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 56636395 and 56636404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56636431) 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, 34508 + ... + 36111.

It is an arithmetic number, because the mean of its divisors is an integer number (10645965).

Almost surely, 2^56636438 is an apocalyptic number.

56636438 is a deficient number, since it is larger than the sum of its proper divisors (28531282).

56636438 is a wasteful number, since it uses less digits than its factorization.

56636438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71022.

The product of its digits is 311040, while the sum is 41.

The square root of 56636438 is about 7525.7184374650. The cubic root of 56636438 is about 384.0301399592.

The spelling of 56636438 in words is "fifty-six million, six hundred thirty-six thousand, four hundred thirty-eight".