22978004 has 12 divisors (see below), whose sum is σ = 45956064. Its totient is φ = 9847704.

The previous prime is 22978003. The next prime is 22978061. The reversal of 22978004 is 40087922.

22978004 is an admirable number.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22978003) 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, 410294 + ... + 410349.

It is an arithmetic number, because the mean of its divisors is an integer number (3829672).

Almost surely, 2^22978004 is an apocalyptic number.

It is an amenable number.

22978004 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

22978004 is a wasteful number, since it uses less digits than its factorization.

22978004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820654 (or 820652 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 22978004 is about 4793.5377332405. The cubic root of 22978004 is about 284.2960115363.

It can be divided in two parts, 2297 and 8004, that added together give a palindrome (10301).

The spelling of 22978004 in words is "twenty-two million, nine hundred seventy-eight thousand, four".