22087264728 has 16 divisors (see below), whose sum is σ = 55218161880. Its totient is φ = 7362421568.

The previous prime is 22087264697. The next prime is 22087264729. The reversal of 22087264728 is 82746278022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22087264729) 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, 460151325 + ... + 460151372.

Almost surely, 2^22087264728 is an apocalyptic number.

It is an amenable number.

22087264728 is an abundant number, since it is smaller than the sum of its proper divisors (33130897152).

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

22087264728 is a wasteful number, since it uses less digits than its factorization.

22087264728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920302706 (or 920302702 counting only the distinct ones).

The product of its (nonzero) digits is 1204224, while the sum is 48.

The spelling of 22087264728 in words is "twenty-two billion, eighty-seven million, two hundred sixty-four thousand, seven hundred twenty-eight".