28818500 has 24 divisors (see below), whose sum is σ = 62940696. Its totient is φ = 11527200.

The previous prime is 28818481. The next prime is 28818511. The reversal of 28818500 is 581882.

It can be written as a sum of positive squares in 4 ways, for example, as 770884 + 28047616 = 878^2 + 5296^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28319 + ... + 29318.

It is an arithmetic number, because the mean of its divisors is an integer number (2622529).

Almost surely, 2^28818500 is an apocalyptic number.

28818500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28818500 is an abundant number, since it is smaller than the sum of its proper divisors (34122196).

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

28818500 is a wasteful number, since it uses less digits than its factorization.

28818500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57656 (or 57644 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 32.

The square root of 28818500 is about 5368.2865050219. The cubic root of 28818500 is about 306.5893918929.

The spelling of 28818500 in words is "twenty-eight million, eight hundred eighteen thousand, five hundred".