56243390 has 32 divisors (see below), whose sum is σ = 118528704. Its totient is φ = 18812160.

The previous prime is 56243389. The next prime is 56243399. The reversal of 56243390 is 9334265.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56243399) 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, 6929 + ... + 12668.

It is an arithmetic number, because the mean of its divisors is an integer number (3704022).

Almost surely, 2^56243390 is an apocalyptic number.

56243390 is an abundant number, since it is smaller than the sum of its proper divisors (62285314).

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

56243390 is a wasteful number, since it uses less digits than its factorization.

56243390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19652.

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 56243390 is about 7499.5593203868. The cubic root of 56243390 is about 383.1397072967.

The spelling of 56243390 in words is "fifty-six million, two hundred forty-three thousand, three hundred ninety".