28749980888 has 16 divisors (see below), whose sum is σ = 53912953080. Its totient is φ = 14373193408.

The previous prime is 28749980869. The next prime is 28749980947. The reversal of 28749980888 is 88808994782.

It is a super-2 number, since 2×28749980888² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155381 + ... + 285732.

Almost surely, 2^28749980888 is an apocalyptic number.

It is an amenable number.

28749980888 is a deficient number, since it is larger than the sum of its proper divisors (25162972192).

28749980888 is a wasteful number, since it uses less digits than its factorization.

28749980888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449266 (or 449262 counting only the distinct ones).

The product of its (nonzero) digits is 148635648, while the sum is 71.

The spelling of 28749980888 in words is "twenty-eight billion, seven hundred forty-nine million, nine hundred eighty thousand, eight hundred eighty-eight".