22978040 has 32 divisors (see below), whose sum is σ = 52965360. Its totient is φ = 8966400.

The previous prime is 22978003. The next prime is 22978061. The reversal of 22978040 is 4087922.

It is a junction number, because it is equal to n+sod(n) for n = 22977988 and 22978006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5366 + ... + 8645.

Almost surely, 2^22978040 is an apocalyptic number.

22978040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22978040 is an abundant number, since it is smaller than the sum of its proper divisors (29987320).

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

22978040 is a wasteful number, since it uses less digits than its factorization.

22978040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14063 (or 14059 counting only the distinct ones).

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

The square root of 22978040 is about 4793.5414882944. The cubic root of 22978040 is about 284.2961600066.

The spelling of 22978040 in words is "twenty-two million, nine hundred seventy-eight thousand, forty".