90939285 has 24 divisors (see below), whose sum is σ = 159853824. Its totient is φ = 47816160.

The previous prime is 90939269. The next prime is 90939293. The reversal of 90939285 is 58293909.

It is not a de Polignac number, because 90939285 - 2⁴ = 90939269 is a prime.

It is a super-2 number, since 2×90939285² = 16539907112622450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 90939285.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 11037 + ... + 17426.

It is an arithmetic number, because the mean of its divisors is an integer number (6660576).

Almost surely, 2^90939285 is an apocalyptic number.

It is an amenable number.

90939285 is a deficient number, since it is larger than the sum of its proper divisors (68914539).

90939285 is a wasteful number, since it uses less digits than its factorization.

90939285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28545 (or 28542 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The square root of 90939285 is about 9536.2091524882. The cubic root of 90939285 is about 449.6940883836.

The spelling of 90939285 in words is "ninety million, nine hundred thirty-nine thousand, two hundred eighty-five".