22978404 has 30 divisors (see below), whose sum is σ = 60070934. Its totient is φ = 7659360.

The previous prime is 22978381. The next prime is 22978421. The reversal of 22978404 is 40487922.

It can be written as a sum of positive squares in only one way, i.e., 22581504 + 396900 = 4752^2 + 630^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 35137 + ... + 35784.

Almost surely, 2^22978404 is an apocalyptic number.

It is an amenable number.

22978404 is an abundant number, since it is smaller than the sum of its proper divisors (37092530).

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

22978404 is a wasteful number, since it uses less digits than its factorization.

22978404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70937 (or 70926 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 22978404 is about 4793.5794558972. The cubic root of 22978404 is about 284.2976611972.

It can be divided in two parts, 2297 and 8404, that added together give a palindrome (10701).

The spelling of 22978404 in words is "twenty-two million, nine hundred seventy-eight thousand, four hundred four".