56889391 has 8 divisors (see below), whose sum is σ = 61370064. Its totient is φ = 52423680.

The previous prime is 56889379. The next prime is 56889397. The reversal of 56889391 is 19398865.

56889391 = T₅₈ + T₅₉ + ... + T₆₉₈.

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 56889391 - 2⁹ = 56888879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56889397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4920 + ... + 11746.

It is an arithmetic number, because the mean of its divisors is an integer number (7671258).

Almost surely, 2^56889391 is an apocalyptic number.

56889391 is a deficient number, since it is larger than the sum of its proper divisors (4480673).

56889391 is a wasteful number, since it uses less digits than its factorization.

56889391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7481.

The product of its digits is 466560, while the sum is 49.

The square root of 56889391 is about 7542.5056181616. The cubic root of 56889391 is about 384.6010169269.

The spelling of 56889391 in words is "fifty-six million, eight hundred eighty-nine thousand, three hundred ninety-one".