28718998 has 24 divisors (see below), whose sum is σ = 54669384. Its totient is φ = 11188800.

The previous prime is 28718971. The next prime is 28719007. The reversal of 28718998 is 89981782.

It is a super-2 number, since 2×28718998² = 1649561692248008, which contains 22 as substring.

It is a congruent 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, 12243 + ... + 14398.

It is an arithmetic number, because the mean of its divisors is an integer number (2277891).

Almost surely, 2^28718998 is an apocalyptic number.

28718998 is a deficient number, since it is larger than the sum of its proper divisors (25950386).

28718998 is a wasteful number, since it uses less digits than its factorization.

28718998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26668 (or 26661 counting only the distinct ones).

The product of its digits is 580608, while the sum is 52.

The square root of 28718998 is about 5359.0109162046. The cubic root of 28718998 is about 306.2361299841.

The spelling of 28718998 in words is "twenty-eight million, seven hundred eighteen thousand, nine hundred ninety-eight".