22712008 has 32 divisors (see below), whose sum is σ = 47229120. Its totient is φ = 10152000.

The previous prime is 22711981. The next prime is 22712021. The reversal of 22712008 is 80021722.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a self number, because there is not a number n which added to its sum of digits gives 22712008.

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, 3253 + ... + 7483.

It is an arithmetic number, because the mean of its divisors is an integer number (1475910).

Almost surely, 2^22712008 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22712008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23614560).

22712008 is an abundant number, since it is smaller than the sum of its proper divisors (24517112).

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

22712008 is a wasteful number, since it uses less digits than its factorization.

22712008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4309 (or 4305 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 22712008 is about 4765.7116992114. The cubic root of 22712008 is about 283.1947366743.

The spelling of 22712008 in words is "twenty-two million, seven hundred twelve thousand, eight".