28431031273 has 8 divisors (see below), whose sum is σ = 30564155520. Its totient is φ = 26361582480.

The previous prime is 28431031253. The next prime is 28431031289. The reversal of 28431031273 is 37213013482.

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-28431031273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28431031253) 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, 15917938 + ... + 15919723.

It is an arithmetic number, because the mean of its divisors is an integer number (3820519440).

Almost surely, 2^28431031273 is an apocalyptic number.

It is an amenable number.

28431031273 is a deficient number, since it is larger than the sum of its proper divisors (2133124247).

28431031273 is a wasteful number, since it uses less digits than its factorization.

28431031273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31837727.

The product of its (nonzero) digits is 24192, while the sum is 34.

The spelling of 28431031273 in words is "twenty-eight billion, four hundred thirty-one million, thirty-one thousand, two hundred seventy-three".