28531009371 has 32 divisors (see below), whose sum is σ = 39877263360. Its totient is φ = 18123494400.

The previous prime is 28531009337. The next prime is 28531009379. The reversal of 28531009371 is 17390013582.

It is not a de Polignac number, because 28531009371 - 2¹⁵ = 28530976603 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28531009379) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1987606 + ... + 2001908.

It is an arithmetic number, because the mean of its divisors is an integer number (1246164480).

Almost surely, 2^28531009371 is an apocalyptic number.

28531009371 is a deficient number, since it is larger than the sum of its proper divisors (11346253989).

28531009371 is a wasteful number, since it uses less digits than its factorization.

28531009371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14667.

The product of its (nonzero) digits is 45360, while the sum is 39.

The spelling of 28531009371 in words is "twenty-eight billion, five hundred thirty-one million, nine thousand, three hundred seventy-one".