22012688 has 20 divisors (see below), whose sum is σ = 45158940. Its totient is φ = 10358784.

The previous prime is 22012687. The next prime is 22012691. The reversal of 22012688 is 88621022.

It can be written as a sum of positive squares in 2 ways, for example, as 16386304 + 5626384 = 4048^2 + 2372^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 22012688.

It is not an unprimeable number, because it can be changed into a prime (22012681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40193 + ... + 40736.

It is an arithmetic number, because the mean of its divisors is an integer number (2257947).

Almost surely, 2^22012688 is an apocalyptic number.

It is an amenable number.

22012688 is an abundant number, since it is smaller than the sum of its proper divisors (23146252).

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

22012688 is a wasteful number, since it uses less digits than its factorization.

22012688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80954 (or 80948 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 22012688 is about 4691.7681102118. The cubic root of 22012688 is about 280.2577897967.

It can be divided in two parts, 22012 and 688, that multiplied together give a triangular number (15144256 = T₅₅₀₃).

The spelling of 22012688 in words is "twenty-two million, twelve thousand, six hundred eighty-eight".