28231432960 has 36 divisors (see below), whose sum is σ = 67623107328. Its totient is φ = 11292572672.

The previous prime is 28231432949. The next prime is 28231432963. The reversal of 28231432960 is 6923413282.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (28231432963) 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, 11026624 + ... + 11029183.

It is an arithmetic number, because the mean of its divisors is an integer number (1878419648).

Almost surely, 2^28231432960 is an apocalyptic number.

28231432960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28231432960 is an abundant number, since it is smaller than the sum of its proper divisors (39391674368).

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

28231432960 is an equidigital number, since it uses as much as digits as its factorization.

28231432960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22055828 (or 22055814 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 40.

The spelling of 28231432960 in words is "twenty-eight billion, two hundred thirty-one million, four hundred thirty-two thousand, nine hundred sixty".