22978623 has 4 divisors (see below), whose sum is σ = 30638168. Its totient is φ = 15319080.

The previous prime is 22978609. The next prime is 22978649. The reversal of 22978623 is 32687922.

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

It is not a de Polignac number, because 22978623 - 2⁶ = 22978559 is a prime.

It is a super-2 number, since 2×22978623² = 1056034229952258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22978603) 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, 3829768 + ... + 3829773.

It is an arithmetic number, because the mean of its divisors is an integer number (7659542).

Almost surely, 2^22978623 is an apocalyptic number.

22978623 is a deficient number, since it is larger than the sum of its proper divisors (7659545).

22978623 is an equidigital number, since it uses as much as digits as its factorization.

22978623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7659544.

The product of its digits is 72576, while the sum is 39.

The square root of 22978623 is about 4793.6022988980. The cubic root of 22978623 is about 284.2985643784.

The spelling of 22978623 in words is "twenty-two million, nine hundred seventy-eight thousand, six hundred twenty-three".