56758391 has 4 divisors (see below), whose sum is σ = 58142784. Its totient is φ = 55374000.

The previous prime is 56758369. The next prime is 56758417. The reversal of 56758391 is 19385765.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 56758391 - 2¹⁰ = 56757367 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 (56758321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 692135 + ... + 692216.

It is an arithmetic number, because the mean of its divisors is an integer number (14535696).

Almost surely, 2^56758391 is an apocalyptic number.

56758391 is a deficient number, since it is larger than the sum of its proper divisors (1384393).

56758391 is a wasteful number, since it uses less digits than its factorization.

56758391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1384392.

The product of its digits is 226800, while the sum is 44.

The square root of 56758391 is about 7533.8164963052. The cubic root of 56758391 is about 384.3055813209.

The spelling of 56758391 in words is "fifty-six million, seven hundred fifty-eight thousand, three hundred ninety-one".