28900500 has 48 divisors (see below), whose sum is σ = 84162624. Its totient is φ = 7706400.

The previous prime is 28900499. The next prime is 28900507. The reversal of 28900500 is 500982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28900507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8134 + ... + 11133.

It is an arithmetic number, because the mean of its divisors is an integer number (1753388).

Almost surely, 2^28900500 is an apocalyptic number.

28900500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28900500 is an abundant number, since it is smaller than the sum of its proper divisors (55262124).

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

28900500 is a wasteful number, since it uses less digits than its factorization.

28900500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19289 (or 19277 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 28900500 is about 5375.9185261683. The cubic root of 28900500 is about 306.8799057762.

The spelling of 28900500 in words is "twenty-eight million, nine hundred thousand, five hundred".