28229566464 has 408 divisors, whose sum is σ = 94056549600. Its totient is φ = 8068792320.

The previous prime is 28229566459. The next prime is 28229566481. The reversal of 28229566464 is 46466592282.

It is a self number, because there is not a number n which added to its sum of digits gives 28229566464.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 123273102 + ... + 123273330.

Almost surely, 2^28229566464 is an apocalyptic number.

28229566464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28229566464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47028274800).

28229566464 is an abundant number, since it is smaller than the sum of its proper divisors (65826983136).

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

28229566464 is a wasteful number, since it uses less digits than its factorization.

28229566464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297 (or 264 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 54.

The spelling of 28229566464 in words is "twenty-eight billion, two hundred twenty-nine million, five hundred sixty-six thousand, four hundred sixty-four".