28032581292 has 24 divisors (see below), whose sum is σ = 65574126576. Its totient is φ = 9320655168.

The previous prime is 28032581281. The next prime is 28032581303. The reversal of 28032581292 is 29218523082.

It is an interprime number because it is at equal distance from previous prime (28032581281) and next prime (28032581303).

It is a super-2 number, since 2×28032581292² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2937363 + ... + 2946890.

It is an arithmetic number, because the mean of its divisors is an integer number (2732255274).

Almost surely, 2^28032581292 is an apocalyptic number.

It is an amenable number.

28032581292 is an abundant number, since it is smaller than the sum of its proper divisors (37541545284).

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

28032581292 is a wasteful number, since it uses less digits than its factorization.

28032581292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5884657 (or 5884655 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

The spelling of 28032581292 in words is "twenty-eight billion, thirty-two million, five hundred eighty-one thousand, two hundred ninety-two".