28758648975 has 24 divisors (see below), whose sum is σ = 54340152960. Its totient is φ = 13146810720.

The previous prime is 28758648953. The next prime is 28758649019. The reversal of 28758648975 is 57984685782.

It is not a de Polignac number, because 28758648975 - 2⁸ = 28758648719 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27388665 + ... + 27389714.

It is an arithmetic number, because the mean of its divisors is an integer number (2264173040).

Almost surely, 2^28758648975 is an apocalyptic number.

28758648975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28758648975 is a deficient number, since it is larger than the sum of its proper divisors (25581503985).

28758648975 is a wasteful number, since it uses less digits than its factorization.

28758648975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54778399 (or 54778394 counting only the distinct ones).

The product of its digits is 270950400, while the sum is 69.

The spelling of 28758648975 in words is "twenty-eight billion, seven hundred fifty-eight million, six hundred forty-eight thousand, nine hundred seventy-five".