56381638 has 8 divisors (see below), whose sum is σ = 85444632. Its totient is φ = 27900096.

The previous prime is 56381609. The next prime is 56381659. The reversal of 56381638 is 83618365.

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

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 56381638.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145120 + ... + 145507.

It is an arithmetic number, because the mean of its divisors is an integer number (10680579).

Almost surely, 2^56381638 is an apocalyptic number.

56381638 is a deficient number, since it is larger than the sum of its proper divisors (29062994).

56381638 is a wasteful number, since it uses less digits than its factorization.

56381638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290726.

The product of its digits is 103680, while the sum is 40.

The square root of 56381638 is about 7508.7707382767. The cubic root of 56381638 is about 383.4533735378.

The spelling of 56381638 in words is "fifty-six million, three hundred eighty-one thousand, six hundred thirty-eight".