90280388 has 24 divisors (see below), whose sum is σ = 172658304. Its totient is φ = 40964000.

The previous prime is 90280369. The next prime is 90280403. The reversal of 90280388 is 88308209.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29381 + ... + 32307.

It is an arithmetic number, because the mean of its divisors is an integer number (7194096).

Almost surely, 2^90280388 is an apocalyptic number.

It is an amenable number.

90280388 is a deficient number, since it is larger than the sum of its proper divisors (82377916).

90280388 is a wasteful number, since it uses less digits than its factorization.

90280388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3643 (or 3641 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 90280388 is about 9501.5992338132. The cubic root of 90280388 is about 448.6053744675.

The spelling of 90280388 in words is "ninety million, two hundred eighty thousand, three hundred eighty-eight".