22478715 has 56 divisors (see below), whose sum is σ = 46273248. Its totient is φ = 10264320.

The previous prime is 22478713. The next prime is 22478747. The reversal of 22478715 is 51787422.

It is not a de Polignac number, because 22478715 - 2¹ = 22478713 is a prime.

Its product of digits (31360) is a multiple of the sum of its prime divisors (896).

It is a self number, because there is not a number n which added to its sum of digits gives 22478715.

It is not an unprimeable number, because it can be changed into a prime (22478711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 25075 + ... + 25955.

It is an arithmetic number, because the mean of its divisors is an integer number (826308).

Almost surely, 2^22478715 is an apocalyptic number.

22478715 is an abundant number, since it is smaller than the sum of its proper divisors (23794533).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22478715 is an frugal number, since it uses more digits than its factorization.

22478715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911 (or 896 counting only the distinct ones).

The product of its digits is 31360, while the sum is 36.

The square root of 22478715 is about 4741.1723233816. The cubic root of 22478715 is about 282.2217585696.

The spelling of 22478715 in words is "twenty-two million, four hundred seventy-eight thousand, seven hundred fifteen".