90285311 has 4 divisors (see below), whose sum is σ = 90679800. Its totient is φ = 89890824.

The previous prime is 90285301. The next prime is 90285319. The reversal of 90285311 is 11358209.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90285311 - 2²² = 86091007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90285319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196901 + ... + 197358.

It is an arithmetic number, because the mean of its divisors is an integer number (22669950).

Almost surely, 2^90285311 is an apocalyptic number.

90285311 is a deficient number, since it is larger than the sum of its proper divisors (394489).

90285311 is a wasteful number, since it uses less digits than its factorization.

90285311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394488.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 90285311 is about 9501.8582919343. The cubic root of 90285311 is about 448.6135284870.

The spelling of 90285311 in words is "ninety million, two hundred eighty-five thousand, three hundred eleven".