22078864 has 10 divisors (see below), whose sum is σ = 42777830. Its totient is φ = 11039424.

The previous prime is 22078843. The next prime is 22078867. The reversal of 22078864 is 46887022.

It can be written as a sum of positive squares in only one way, i.e., 14745600 + 7333264 = 3840^2 + 2708^2 .

It is not an unprimeable number, because it can be changed into a prime (22078867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689949 + ... + 689980.

It is an arithmetic number, because the mean of its divisors is an integer number (4277783).

Almost surely, 2^22078864 is an apocalyptic number.

It is an amenable number.

22078864 is a deficient number, since it is larger than the sum of its proper divisors (20698966).

22078864 is a wasteful number, since it uses less digits than its factorization.

22078864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1379937 (or 1379931 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 37.

The square root of 22078864 is about 4698.8151698061. The cubic root of 22078864 is about 280.5383520100.

The spelling of 22078864 in words is "twenty-two million, seventy-eight thousand, eight hundred sixty-four".