56821368 has 16 divisors (see below), whose sum is σ = 142053480. Its totient is φ = 18940448.

The previous prime is 56821337. The next prime is 56821379. The reversal of 56821368 is 86312865.

It is a happy number.

It is a super-2 number, since 2×56821368² = 6457335722782848, which contains 22 as substring.

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, 1183755 + ... + 1183802.

Almost surely, 2^56821368 is an apocalyptic number.

It is an amenable number.

56821368 is an abundant number, since it is smaller than the sum of its proper divisors (85232112).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56821368 is a wasteful number, since it uses less digits than its factorization.

56821368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2367566 (or 2367562 counting only the distinct ones).

The product of its digits is 69120, while the sum is 39.

The square root of 56821368 is about 7537.9949588733. The cubic root of 56821368 is about 384.4476658440.

The spelling of 56821368 in words is "fifty-six million, eight hundred twenty-one thousand, three hundred sixty-eight".