22716428 has 24 divisors (see below), whose sum is σ = 46900224. Its totient is φ = 9421200.

The previous prime is 22716401. The next prime is 22716431. The reversal of 22716428 is 82461722.

It is a super-2 number, since 2×22716428² = 1032072202158368, which contains 22 as substring.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 22716394 and 22716403.

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, 12218 + ... + 13953.

It is an arithmetic number, because the mean of its divisors is an integer number (1954176).

Almost surely, 2^22716428 is an apocalyptic number.

22716428 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

22716428 is an abundant number, since it is smaller than the sum of its proper divisors (24183796).

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

22716428 is a wasteful number, since it uses less digits than its factorization.

22716428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26213 (or 26211 counting only the distinct ones).

The product of its digits is 10752, while the sum is 32.

The square root of 22716428 is about 4766.1754059203. The cubic root of 22716428 is about 283.2131063923.

The spelling of 22716428 in words is "twenty-two million, seven hundred sixteen thousand, four hundred twenty-eight".