28942621568 has 64 divisors (see below), whose sum is σ = 69364406400. Its totient is φ = 11751132672.

The previous prime is 28942621523. The next prime is 28942621571. The reversal of 28942621568 is 86512624982.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

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, 833030 + ... + 867077.

It is an arithmetic number, because the mean of its divisors is an integer number (1083818850).

Almost surely, 2^28942621568 is an apocalyptic number.

28942621568 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28942621568 is an abundant number, since it is smaller than the sum of its proper divisors (40421784832).

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

28942621568 is a wasteful number, since it uses less digits than its factorization.

28942621568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1700147 (or 1700135 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 53.

The spelling of 28942621568 in words is "twenty-eight billion, nine hundred forty-two million, six hundred twenty-one thousand, five hundred sixty-eight".