22978965 has 16 divisors (see below), whose sum is σ = 37211328. Its totient is φ = 12107136.

The previous prime is 22978957. The next prime is 22978973. The reversal of 22978965 is 56987922.

It is an interprime number because it is at equal distance from previous prime (22978957) and next prime (22978973).

It is not a de Polignac number, because 22978965 - 2³ = 22978957 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7984 + ... + 10473.

It is an arithmetic number, because the mean of its divisors is an integer number (2325708).

Almost surely, 2^22978965 is an apocalyptic number.

It is an amenable number.

22978965 is a deficient number, since it is larger than the sum of its proper divisors (14232363).

22978965 is a wasteful number, since it uses less digits than its factorization.

22978965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18548.

The product of its digits is 544320, while the sum is 48.

The square root of 22978965 is about 4793.6379713116. The cubic root of 22978965 is about 284.2999748144.

The spelling of 22978965 in words is "twenty-two million, nine hundred seventy-eight thousand, nine hundred sixty-five".