56388019 has 8 divisors (see below), whose sum is σ = 58931712. Its totient is φ = 53852040.

The previous prime is 56388001. The next prime is 56388041. The reversal of 56388019 is 91088365.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 56388019 - 2¹¹ = 56385971 is a prime.

It is a super-2 number, since 2×56388019² = 6359217373488722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56388919) 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, 17142 + ... + 20164.

It is an arithmetic number, because the mean of its divisors is an integer number (7366464).

Almost surely, 2^56388019 is an apocalyptic number.

56388019 is a deficient number, since it is larger than the sum of its proper divisors (2543693).

56388019 is a wasteful number, since it uses less digits than its factorization.

56388019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3857.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 56388019 is about 7509.1956293600. The cubic root of 56388019 is about 383.4678387890.

The spelling of 56388019 in words is "fifty-six million, three hundred eighty-eight thousand, nineteen".