28531270373 has 4 divisors (see below), whose sum is σ = 28535749440. Its totient is φ = 28526791308.

The previous prime is 28531270331. The next prime is 28531270379. The reversal of 28531270373 is 37307213582.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28531270373 - 2²⁴ = 28514493157 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28531270373.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28531270379) 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, 2229965 + ... + 2242722.

It is an arithmetic number, because the mean of its divisors is an integer number (7133937360).

Almost surely, 2^28531270373 is an apocalyptic number.

It is an amenable number.

28531270373 is a deficient number, since it is larger than the sum of its proper divisors (4479067).

28531270373 is an equidigital number, since it uses as much as digits as its factorization.

28531270373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4479066.

The product of its (nonzero) digits is 211680, while the sum is 41.

The spelling of 28531270373 in words is "twenty-eight billion, five hundred thirty-one million, two hundred seventy thousand, three hundred seventy-three".