28091704459 has 32 divisors (see below), whose sum is σ = 37136960000. Its totient is φ = 21056529312.

The previous prime is 28091704411. The next prime is 28091704469. The reversal of 28091704459 is 95440719082.

It is not a de Polignac number, because 28091704459 - 2¹³ = 28091696267 is a prime.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (28091704469) 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, 81069 + ... + 250510.

It is an arithmetic number, because the mean of its divisors is an integer number (1160530000).

Almost surely, 2^28091704459 is an apocalyptic number.

28091704459 is a deficient number, since it is larger than the sum of its proper divisors (9045255541).

28091704459 is a wasteful number, since it uses less digits than its factorization.

28091704459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331632 (or 331618 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 49.

The spelling of 28091704459 in words is "twenty-eight billion, ninety-one million, seven hundred four thousand, four hundred fifty-nine".