22864440 has 32 divisors (see below), whose sum is σ = 68593680. Its totient is φ = 6097152.

The previous prime is 22864399. The next prime is 22864459. The reversal of 22864440 is 4446822.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 22864398 and 22864407.

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, 95149 + ... + 95388.

Almost surely, 2^22864440 is an apocalyptic number.

22864440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22864440 is an abundant number, since it is smaller than the sum of its proper divisors (45729240).

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

22864440 is a wasteful number, since it uses less digits than its factorization.

22864440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190551 (or 190547 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 30.

The square root of 22864440 is about 4781.6775299052. The cubic root of 22864440 is about 283.8268798777.

The spelling of 22864440 in words is "twenty-two million, eight hundred sixty-four thousand, four hundred forty".