28936054431 has 12 divisors (see below), whose sum is σ = 41920552752. Its totient is φ = 19233458496.

The previous prime is 28936054417. The next prime is 28936054463. The reversal of 28936054431 is 13445063982.

28936054431 is a `hidden beast` number, since 2 + 8 + 9 + 3 + 605 + 4 + 4 + 31 = 666.

It is not a de Polignac number, because 28936054431 - 2⁹ = 28936053919 is a prime.

It is a super-2 number, since 2×28936054431² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28936054471) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4767171 + ... + 4773236.

It is an arithmetic number, because the mean of its divisors is an integer number (3493379396).

Almost surely, 2^28936054431 is an apocalyptic number.

28936054431 is a deficient number, since it is larger than the sum of its proper divisors (12984498321).

28936054431 is a wasteful number, since it uses less digits than its factorization.

28936054431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9540750 (or 9540747 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The spelling of 28936054431 in words is "twenty-eight billion, nine hundred thirty-six million, fifty-four thousand, four hundred thirty-one".