28902500 has 60 divisors (see below), whose sum is σ = 69015408. Its totient is φ = 10500000.

The previous prime is 28902487. The next prime is 28902529. The reversal of 28902500 is 520982.

It is a self number, because there is not a number n which added to its sum of digits gives 28902500.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 26975 + ... + 28025.

Almost surely, 2^28902500 is an apocalyptic number.

28902500 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 28902500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34507704).

28902500 is an abundant number, since it is smaller than the sum of its proper divisors (40112908).

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

28902500 is a wasteful number, since it uses less digits than its factorization.

28902500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1086 (or 1069 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 28902500 is about 5376.1045376741. The cubic root of 28902500 is about 306.8869846117.

The spelling of 28902500 in words is "twenty-eight million, nine hundred two thousand, five hundred".