90428280 has 32 divisors (see below), whose sum is σ = 271285200. Its totient is φ = 24114176.

The previous prime is 90428243. The next prime is 90428309. The reversal of 90428280 is 8282409.

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, 376665 + ... + 376904.

Almost surely, 2^90428280 is an apocalyptic number.

It is an amenable number.

90428280 is an abundant number, since it is smaller than the sum of its proper divisors (180856920).

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

90428280 is a wasteful number, since it uses less digits than its factorization.

90428280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 753583 (or 753579 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 90428280 is about 9509.3785285896. The cubic root of 90428280 is about 448.8502004402.

The spelling of 90428280 in words is "ninety million, four hundred twenty-eight thousand, two hundred eighty".