90806285 has 8 divisors (see below), whose sum is σ = 112482816. Its totient is φ = 70301520.

The previous prime is 90806281. The next prime is 90806293. The reversal of 90806285 is 58260809.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 90806285 - 2² = 90806281 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 (90806281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 292769 + ... + 293078.

It is an arithmetic number, because the mean of its divisors is an integer number (14060352).

Almost surely, 2^90806285 is an apocalyptic number.

It is an amenable number.

90806285 is a deficient number, since it is larger than the sum of its proper divisors (21676531).

90806285 is a wasteful number, since it uses less digits than its factorization.

90806285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585883.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 90806285 is about 9529.2331800623. The cubic root of 90806285 is about 449.4747534182.

The spelling of 90806285 in words is "ninety million, eight hundred six thousand, two hundred eighty-five".