28937900 has 54 divisors (see below), whose sum is σ = 64649508. Its totient is φ = 11242400.

The previous prime is 28937869. The next prime is 28937929. The reversal of 28937900 is 973982.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 220835 + ... + 220965.

Almost surely, 2^28937900 is an apocalyptic number.

28937900 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 28937900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32324754).

28937900 is an abundant number, since it is smaller than the sum of its proper divisors (35711608).

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

28937900 is a wasteful number, since it uses less digits than its factorization.

28937900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239 (or 185 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 28937900 is about 5379.3958768620. The cubic root of 28937900 is about 307.0122259912.

The spelling of 28937900 in words is "twenty-eight million, nine hundred thirty-seven thousand, nine hundred".