28731514275 has 72 divisors (see below), whose sum is σ = 54998493264. Its totient is φ = 14287104000.

The previous prime is 28731514261. The next prime is 28731514283. The reversal of 28731514275 is 57241513782.

28731514275 is a `hidden beast` number, since 2 + 8 + 73 + 151 + 427 + 5 = 666.

It is not a de Polignac number, because 28731514275 - 2⁵ = 28731514243 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 28731514275.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 374175 + ... + 444375.

It is an arithmetic number, because the mean of its divisors is an integer number (763867962).

Almost surely, 2^28731514275 is an apocalyptic number.

28731514275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28731514275 is a deficient number, since it is larger than the sum of its proper divisors (26266978989).

28731514275 is a wasteful number, since it uses less digits than its factorization.

28731514275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70341 (or 70333 counting only the distinct ones).

The product of its digits is 470400, while the sum is 45.

The spelling of 28731514275 in words is "twenty-eight billion, seven hundred thirty-one million, five hundred fourteen thousand, two hundred seventy-five".