28500984 has 80 divisors (see below), whose sum is σ = 80600520. Its totient is φ = 9447840.

The previous prime is 28500919. The next prime is 28500991. The reversal of 28500984 is 48900582.

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 19 ways as a sum of consecutive naturals, for example, 157374 + ... + 157554.

Almost surely, 2^28500984 is an apocalyptic number.

28500984 is a gapful number since it is divisible by the number (24) 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 28500984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40300260).

28500984 is an abundant number, since it is smaller than the sum of its proper divisors (52099536).

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

28500984 is an frugal number, since it uses more digits than its factorization.

28500984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214 (or 186 counting only the distinct ones).

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

The square root of 28500984 is about 5338.6312852640. The cubic root of 28500984 is about 305.4592525944.

The spelling of 28500984 in words is "twenty-eight million, five hundred thousand, nine hundred eighty-four".