90940290 has 32 divisors (see below), whose sum is σ = 249436800. Its totient is φ = 20786304.

The previous prime is 90940273. The next prime is 90940301. The reversal of 90940290 is 9204909.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 216315 + ... + 216734.

It is an arithmetic number, because the mean of its divisors is an integer number (7794900).

Almost surely, 2^90940290 is an apocalyptic number.

90940290 is an abundant number, since it is smaller than the sum of its proper divisors (158496510).

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

90940290 is a wasteful number, since it uses less digits than its factorization.

90940290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433066.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 90940290 is about 9536.2618462372. The cubic root of 90940290 is about 449.6957449500.

The spelling of 90940290 in words is "ninety million, nine hundred forty thousand, two hundred ninety".