90028280 has 32 divisors (see below), whose sum is σ = 203243040. Its totient is φ = 35890560.

The previous prime is 90028273. The next prime is 90028297. The reversal of 90028280 is 8282009.

It is a congruent number.

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, 8822 + ... + 16058.

It is an arithmetic number, because the mean of its divisors is an integer number (6351345).

Almost surely, 2^90028280 is an apocalyptic number.

It is an amenable number.

90028280 is an abundant number, since it is smaller than the sum of its proper divisors (113214760).

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

90028280 is a wasteful number, since it uses less digits than its factorization.

90028280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7559 (or 7555 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 90028280 is about 9488.3233503080. The cubic root of 90028280 is about 448.1874083055.

The spelling of 90028280 in words is "ninety million, twenty-eight thousand, two hundred eighty".