90190287 has 32 divisors (see below), whose sum is σ = 154344960. Its totient is φ = 51442560.

The previous prime is 90190279. The next prime is 90190351. The reversal of 90190287 is 78209109.

It is a happy number.

It is not a de Polignac number, because 90190287 - 2³ = 90190279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90190237) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 3883 + ... + 13980.

It is an arithmetic number, because the mean of its divisors is an integer number (4823280).

Almost surely, 2^90190287 is an apocalyptic number.

90190287 is a deficient number, since it is larger than the sum of its proper divisors (64154673).

90190287 is a wasteful number, since it uses less digits than its factorization.

90190287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17900 (or 17894 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 90190287 is about 9496.8566905055. The cubic root of 90190287 is about 448.4560867957.

The spelling of 90190287 in words is "ninety million, one hundred ninety thousand, two hundred eighty-seven".