28913100 has 36 divisors (see below), whose sum is σ = 83656104. Its totient is φ = 7710080.

The previous prime is 28913063. The next prime is 28913123. The reversal of 28913100 is 131982.

It is a super-2 number, since 2×28913100² = 1671934703220000, which contains 22 as substring.

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, 47889 + ... + 48488.

Almost surely, 2^28913100 is an apocalyptic number.

28913100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28913100 is an abundant number, since it is smaller than the sum of its proper divisors (54743004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28913100 is a wasteful number, since it uses less digits than its factorization.

28913100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96394 (or 96387 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 28913100 is about 5377.0902912263. The cubic root of 28913100 is about 306.9244969888.

The spelling of 28913100 in words is "twenty-eight million, nine hundred thirteen thousand, one hundred".