56809398 has 16 divisors (see below), whose sum is σ = 113932800. Its totient is φ = 18884136.

The previous prime is 56809397. The next prime is 56809399. The reversal of 56809398 is 89390865.

It is an interprime number because it is at equal distance from previous prime (56809397) and next prime (56809399).

It is a super-2 number, since 2×56809398² = 6454615402244808, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56809397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10698 + ... + 15101.

It is an arithmetic number, because the mean of its divisors is an integer number (7120800).

Almost surely, 2^56809398 is an apocalyptic number.

56809398 is an abundant number, since it is smaller than the sum of its proper divisors (57123402).

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

56809398 is a wasteful number, since it uses less digits than its factorization.

56809398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26171.

The product of its (nonzero) digits is 466560, while the sum is 48.

The square root of 56809398 is about 7537.2009393408. The cubic root of 56809398 is about 384.4206680090.

The spelling of 56809398 in words is "fifty-six million, eight hundred nine thousand, three hundred ninety-eight".