22978328 has 8 divisors (see below), whose sum is σ = 43084380. Its totient is φ = 11489160.

The previous prime is 22978321. The next prime is 22978337. The reversal of 22978328 is 82387922.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22978321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1436138 + ... + 1436153.

Almost surely, 2^22978328 is an apocalyptic number.

It is an amenable number.

22978328 is a deficient number, since it is larger than the sum of its proper divisors (20106052).

22978328 is a wasteful number, since it uses less digits than its factorization.

22978328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2872297 (or 2872293 counting only the distinct ones).

The product of its digits is 96768, while the sum is 41.

The square root of 22978328 is about 4793.5715286204. The cubic root of 22978328 is about 284.2973477631.

The spelling of 22978328 in words is "twenty-two million, nine hundred seventy-eight thousand, three hundred twenty-eight".