56840091 has 32 divisors (see below), whose sum is σ = 94972416. Its totient is φ = 29376000.

The previous prime is 56840089. The next prime is 56840093. The reversal of 56840091 is 19004865.

It is an interprime number because it is at equal distance from previous prime (56840089) and next prime (56840093).

It is not a de Polignac number, because 56840091 - 2¹ = 56840089 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (56840093) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55161 + ... + 56181.

It is an arithmetic number, because the mean of its divisors is an integer number (2967888).

Almost surely, 2^56840091 is an apocalyptic number.

56840091 is a deficient number, since it is larger than the sum of its proper divisors (38132325).

56840091 is a wasteful number, since it uses less digits than its factorization.

56840091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1283.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 56840091 is about 7539.2367650844. The cubic root of 56840091 is about 384.4898871857.

The spelling of 56840091 in words is "fifty-six million, eight hundred forty thousand, ninety-one".