22278004 has 12 divisors (see below), whose sum is σ = 44556064. Its totient is φ = 9547704.

The previous prime is 22277989. The next prime is 22278017. The reversal of 22278004 is 40087222.

22278004 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 22278004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 397794 + ... + 397849.

Almost surely, 2^22278004 is an apocalyptic number.

It is an amenable number.

22278004 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.

22278004 is a wasteful number, since it uses less digits than its factorization.

22278004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 795654 (or 795652 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 22278004 is about 4719.9580506610. The cubic root of 22278004 is about 281.3792660765.

The spelling of 22278004 in words is "twenty-two million, two hundred seventy-eight thousand, four".