28454900 has 72 divisors (see below), whose sum is σ = 65162496. Its totient is φ = 10771200.

The previous prime is 28454879. The next prime is 28454911. The reversal of 28454900 is 945482.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 207632 + ... + 207768.

Almost surely, 2^28454900 is an apocalyptic number.

28454900 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 28454900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32581248).

28454900 is an abundant number, since it is smaller than the sum of its proper divisors (36707596).

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

28454900 is a wasteful number, since it uses less digits than its factorization.

28454900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249 (or 242 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 28454900 is about 5334.3134516074. The cubic root of 28454900 is about 305.2945287138.

The spelling of 28454900 in words is "twenty-eight million, four hundred fifty-four thousand, nine hundred".