90402235 has 16 divisors (see below), whose sum is σ = 135251712. Its totient is φ = 56354400.

The previous prime is 90402227. The next prime is 90402239. The reversal of 90402235 is 53220409.

It is a happy number.

It is not a de Polignac number, because 90402235 - 2³ = 90402227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90402239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117021 + ... + 117790.

It is an arithmetic number, because the mean of its divisors is an integer number (8453232).

Almost surely, 2^90402235 is an apocalyptic number.

90402235 is a deficient number, since it is larger than the sum of its proper divisors (44849477).

90402235 is a wasteful number, since it uses less digits than its factorization.

90402235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234834.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 90402235 is about 9508.0089924232. The cubic root of 90402235 is about 448.8071039443.

The spelling of 90402235 in words is "ninety million, four hundred two thousand, two hundred thirty-five".