28502881031 has 8 divisors (see below), whose sum is σ = 29759683200. Its totient is φ = 27247541112.

The previous prime is 28502881009. The next prime is 28502881049. The reversal of 28502881031 is 13018820582.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28502881031 is a prime.

It is a super-2 number, since 2×28502881031² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28522881031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 325625 + ... + 403778.

It is an arithmetic number, because the mean of its divisors is an integer number (3719960400).

Almost surely, 2^28502881031 is an apocalyptic number.

28502881031 is a deficient number, since it is larger than the sum of its proper divisors (1256802169).

28502881031 is a wasteful number, since it uses less digits than its factorization.

28502881031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731125.

The product of its (nonzero) digits is 30720, while the sum is 38.

The spelling of 28502881031 in words is "twenty-eight billion, five hundred two million, eight hundred eighty-one thousand, thirty-one".