28331427972 has 24 divisors (see below), whose sum is σ = 69585964000. Its totient is φ = 8946766656.

The previous prime is 28331427967. The next prime is 28331427977. The reversal of 28331427972 is 27972413382.

It is an interprime number because it is at equal distance from previous prime (28331427967) and next prime (28331427977).

It is not an unprimeable number, because it can be changed into a prime (28331427977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62130097 + ... + 62130552.

Almost surely, 2^28331427972 is an apocalyptic number.

It is an amenable number.

28331427972 is an abundant number, since it is smaller than the sum of its proper divisors (41254536028).

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

28331427972 is a wasteful number, since it uses less digits than its factorization.

28331427972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124260675 (or 124260673 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 48.

The spelling of 28331427972 in words is "twenty-eight billion, three hundred thirty-one million, four hundred twenty-seven thousand, nine hundred seventy-two".