28431018224 has 40 divisors (see below), whose sum is σ = 62976052608. Its totient is φ = 12180530880.

The previous prime is 28431018211. The next prime is 28431018233. The reversal of 28431018224 is 42281013482.

It is a Cunningham number, because it is equal to 168615²-1.

It is a super-2 number, since 2×28431018224² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 295079 + ... + 379385.

Almost surely, 2^28431018224 is an apocalyptic number.

It is an amenable number.

28431018224 is an abundant number, since it is smaller than the sum of its proper divisors (34545034384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28431018224 is a wasteful number, since it uses less digits than its factorization.

28431018224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87333 (or 87327 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 35.

The spelling of 28431018224 in words is "twenty-eight billion, four hundred thirty-one million, eighteen thousand, two hundred twenty-four".