28587500 has 36 divisors (see below), whose sum is σ = 62558496. Its totient is φ = 11430000.

The previous prime is 28587499. The next prime is 28587509. The reversal of 28587500 is 578582.

It is not an unprimeable number, because it can be changed into a prime (28587509) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11357 + ... + 13643.

It is an arithmetic number, because the mean of its divisors is an integer number (1737736).

Almost surely, 2^28587500 is an apocalyptic number.

28587500 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 28587500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31279248).

28587500 is an abundant number, since it is smaller than the sum of its proper divisors (33970996).

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

28587500 is an equidigital number, since it uses as much as digits as its factorization.

28587500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2316 (or 2294 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 35.

The square root of 28587500 is about 5346.7279713859. The cubic root of 28587500 is about 305.7680187465.

The spelling of 28587500 in words is "twenty-eight million, five hundred eighty-seven thousand, five hundred".