28431589215 has 32 divisors (see below), whose sum is σ = 45872064000. Its totient is φ = 15036681600.

The previous prime is 28431589213. The next prime is 28431589223. The reversal of 28431589215 is 51298513482.

It is not a de Polignac number, because 28431589215 - 2¹ = 28431589213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28431589213) 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, 1373190 + ... + 1393740.

It is an arithmetic number, because the mean of its divisors is an integer number (1433502000).

Almost surely, 2^28431589215 is an apocalyptic number.

28431589215 is a deficient number, since it is larger than the sum of its proper divisors (17440474785).

28431589215 is a wasteful number, since it uses less digits than its factorization.

28431589215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21327.

The product of its digits is 691200, while the sum is 48.

The spelling of 28431589215 in words is "twenty-eight billion, four hundred thirty-one million, five hundred eighty-nine thousand, two hundred fifteen".