28665100 has 18 divisors (see below), whose sum is σ = 62203484. Its totient is φ = 11466000.

The previous prime is 28665041. The next prime is 28665101. The reversal of 28665100 is 156682.

It is not an unprimeable number, because it can be changed into a prime (28665101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 143226 + ... + 143425.

Almost surely, 2^28665100 is an apocalyptic number.

28665100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28665100 is an abundant number, since it is smaller than the sum of its proper divisors (33538384).

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

28665100 is a wasteful number, since it uses less digits than its factorization.

28665100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286665 (or 286658 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 28665100 is about 5353.9798281279. The cubic root of 28665100 is about 306.0444351437.

The spelling of 28665100 in words is "twenty-eight million, six hundred sixty-five thousand, one hundred".