28300090 has 64 divisors (see below), whose sum is σ = 63431424. Its totient is φ = 8851968.

The previous prime is 28300043. The next prime is 28300093. The reversal of 28300090 is 9000382.

It is not an unprimeable number, because it can be changed into a prime (28300093) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 124557 + ... + 124783.

It is an arithmetic number, because the mean of its divisors is an integer number (991116).

Almost surely, 2^28300090 is an apocalyptic number.

28300090 is an abundant number, since it is smaller than the sum of its proper divisors (35131334).

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

28300090 is a wasteful number, since it uses less digits than its factorization.

28300090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 28300090 is about 5319.7828903067. The cubic root of 28300090 is about 304.7398659852.

The spelling of 28300090 in words is "twenty-eight million, three hundred thousand, ninety".