28758331475 has 12 divisors (see below), whose sum is σ = 35662725624. Its totient is φ = 23005120320.

The previous prime is 28758331457. The next prime is 28758331519. The reversal of 28758331475 is 57413385782.

It is a de Polignac number, because none of the positive numbers 2^k-28758331475 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 475127 + ... + 532223.

It is an arithmetic number, because the mean of its divisors is an integer number (2971893802).

Almost surely, 2^28758331475 is an apocalyptic number.

28758331475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28758331475 is a deficient number, since it is larger than the sum of its proper divisors (6904394149).

28758331475 is a wasteful number, since it uses less digits than its factorization.

28758331475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77254 (or 77249 counting only the distinct ones).

The product of its digits is 5644800, while the sum is 53.

The spelling of 28758331475 in words is "twenty-eight billion, seven hundred fifty-eight million, three hundred thirty-one thousand, four hundred seventy-five".