28998123 has 32 divisors (see below), whose sum is σ = 50749440. Its totient is φ = 14268960.

The previous prime is 28998097. The next prime is 28998127. The reversal of 28998123 is 32189982.

It is not a de Polignac number, because 28998123 - 2⁵ = 28998091 is a prime.

It is a super-2 number, since 2×28998123² = 1681782275046258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28998127) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 1086 + ... + 7692.

It is an arithmetic number, because the mean of its divisors is an integer number (1585920).

Almost surely, 2^28998123 is an apocalyptic number.

28998123 is a deficient number, since it is larger than the sum of its proper divisors (21751317).

28998123 is a wasteful number, since it uses less digits than its factorization.

28998123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6647.

The product of its digits is 62208, while the sum is 42.

The square root of 28998123 is about 5384.9905292396. The cubic root of 28998123 is about 307.2250539903.

The spelling of 28998123 in words is "twenty-eight million, nine hundred ninety-eight thousand, one hundred twenty-three".