56477789 has 8 divisors (see below), whose sum is σ = 57108480. Its totient is φ = 55850256.

The previous prime is 56477779. The next prime is 56477803. The reversal of 56477789 is 98777465.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56477789 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56477789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56477749) 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, 55247 + ... + 56259.

It is an arithmetic number, because the mean of its divisors is an integer number (7138560).

Almost surely, 2^56477789 is an apocalyptic number.

It is an amenable number.

56477789 is a deficient number, since it is larger than the sum of its proper divisors (630691).

56477789 is a wasteful number, since it uses less digits than its factorization.

56477789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1579.

The product of its digits is 2963520, while the sum is 53.

The square root of 56477789 is about 7515.1705902128. The cubic root of 56477789 is about 383.6712251168.

The spelling of 56477789 in words is "fifty-six million, four hundred seventy-seven thousand, seven hundred eighty-nine".