22732428 has 12 divisors (see below), whose sum is σ = 53042360. Its totient is φ = 7577472.

The previous prime is 22732403. The next prime is 22732439. The reversal of 22732428 is 82423722.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 22732395 and 22732404.

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, 947173 + ... + 947196.

Almost surely, 2^22732428 is an apocalyptic number.

It is an amenable number.

22732428 is an abundant number, since it is smaller than the sum of its proper divisors (30309932).

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

22732428 is a wasteful number, since it uses less digits than its factorization.

22732428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1894376 (or 1894374 counting only the distinct ones).

The product of its digits is 10752, while the sum is 30.

The square root of 22732428 is about 4767.8536051351. The cubic root of 22732428 is about 283.2795831911.

The spelling of 22732428 in words is "twenty-two million, seven hundred thirty-two thousand, four hundred twenty-eight".