28453900 has 18 divisors (see below), whose sum is σ = 61745180. Its totient is φ = 11381520.

The previous prime is 28453861. The next prime is 28453927. The reversal of 28453900 is 935482.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 142170 + ... + 142369.

Almost surely, 2^28453900 is an apocalyptic number.

28453900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28453900 is an abundant number, since it is smaller than the sum of its proper divisors (33291280).

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

28453900 is a wasteful number, since it uses less digits than its factorization.

28453900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284553 (or 284546 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 28453900 is about 5334.2197180094. The cubic root of 28453900 is about 305.2909523162.

The spelling of 28453900 in words is "twenty-eight million, four hundred fifty-three thousand, nine hundred".