90908290 has 32 divisors (see below), whose sum is σ = 178982784. Its totient is φ = 32970240.

The previous prime is 90908269. The next prime is 90908413. The reversal of 90908290 is 9280909.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52722 + ... + 54418.

It is an arithmetic number, because the mean of its divisors is an integer number (5593212).

Almost surely, 2^90908290 is an apocalyptic number.

90908290 is a deficient number, since it is larger than the sum of its proper divisors (88074494).

90908290 is a wasteful number, since it uses less digits than its factorization.

90908290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2202.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 90908290 is about 9534.5838923364. The cubic root of 90908290 is about 449.6429925633.

The spelling of 90908290 in words is "ninety million, nine hundred eight thousand, two hundred ninety".