28458900 has 108 divisors (see below), whose sum is σ = 90362272. Its totient is φ = 7490880.

The previous prime is 28458893. The next prime is 28458917. The reversal of 28458900 is 985482.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 92547 + ... + 92853.

Almost surely, 2^28458900 is an apocalyptic number.

28458900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28458900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45181136).

28458900 is an abundant number, since it is smaller than the sum of its proper divisors (61903372).

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

28458900 is a wasteful number, since it uses less digits than its factorization.

28458900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430 (or 420 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 28458900 is about 5334.6883695301. The cubic root of 28458900 is about 305.3088334662.

The spelling of 28458900 in words is "twenty-eight million, four hundred fifty-eight thousand, nine hundred".