28724791233 has 16 divisors (see below), whose sum is σ = 39621985920. Its totient is φ = 18496285056.

The previous prime is 28724791201. The next prime is 28724791253. The reversal of 28724791233 is 33219742782.

It is not a de Polignac number, because 28724791233 - 2⁵ = 28724791201 is a prime.

It is a super-2 number, since 2×28724791233² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28724791253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 929253 + ... + 959666.

It is an arithmetic number, because the mean of its divisors is an integer number (2476374120).

Almost surely, 2^28724791233 is an apocalyptic number.

It is an amenable number.

28724791233 is a deficient number, since it is larger than the sum of its proper divisors (10897194687).

28724791233 is a wasteful number, since it uses less digits than its factorization.

28724791233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1889096.

The product of its digits is 1016064, while the sum is 48.

The spelling of 28724791233 in words is "twenty-eight billion, seven hundred twenty-four million, seven hundred ninety-one thousand, two hundred thirty-three".