28545804731 has 8 divisors (see below), whose sum is σ = 28870052400. Its totient is φ = 28221635200.

The previous prime is 28545804713. The next prime is 28545804751. The reversal of 28545804731 is 13740854582.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28545804731 is a prime.

It is a super-2 number, since 2×28545804731² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28545804751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1036700 + ... + 1063878.

It is an arithmetic number, because the mean of its divisors is an integer number (3608756550).

Almost surely, 2^28545804731 is an apocalyptic number.

28545804731 is a deficient number, since it is larger than the sum of its proper divisors (324247669).

28545804731 is a wasteful number, since it uses less digits than its factorization.

28545804731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39069.

The product of its (nonzero) digits is 1075200, while the sum is 47.

The spelling of 28545804731 in words is "twenty-eight billion, five hundred forty-five million, eight hundred four thousand, seven hundred thirty-one".