28697856424 has 192 divisors, whose sum is σ = 63387072000. Its totient is φ = 12118740480.

The previous prime is 28697856419. The next prime is 28697856449. The reversal of 28697856424 is 42465879682.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 72286594 + ... + 72286990.

It is an arithmetic number, because the mean of its divisors is an integer number (330141000).

Almost surely, 2^28697856424 is an apocalyptic number.

It is an amenable number.

28697856424 is an abundant number, since it is smaller than the sum of its proper divisors (34689215576).

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

28697856424 is a wasteful number, since it uses less digits than its factorization.

28697856424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528 (or 501 counting only the distinct ones).

The product of its digits is 46448640, while the sum is 61.

The spelling of 28697856424 in words is "twenty-eight billion, six hundred ninety-seven million, eight hundred fifty-six thousand, four hundred twenty-four".