28867917232 has 80 divisors (see below), whose sum is σ = 71156160000. Its totient is φ = 11247216960.

The previous prime is 28867917229. The next prime is 28867917241. The reversal of 28867917232 is 23271976882.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 178732 + ... + 299467.

It is an arithmetic number, because the mean of its divisors is an integer number (889452000).

Almost surely, 2^28867917232 is an apocalyptic number.

28867917232 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28867917232 is an abundant number, since it is smaller than the sum of its proper divisors (42288242768).

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

28867917232 is a wasteful number, since it uses less digits than its factorization.

28867917232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478239 (or 478219 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 55.

The spelling of 28867917232 in words is "twenty-eight billion, eight hundred sixty-seven million, nine hundred seventeen thousand, two hundred thirty-two".