90678285 has 40 divisors (see below), whose sum is σ = 163579416. Its totient is φ = 48055680.

The previous prime is 90678277. The next prime is 90678293. The reversal of 90678285 is 58287609.

It is an interprime number because it is at equal distance from previous prime (90678277) and next prime (90678293).

It can be written as a sum of positive squares in 4 ways, for example, as 1205604 + 89472681 = 1098^2 + 9459^2 .

It is not a de Polignac number, because 90678285 - 2³ = 90678277 is a prime.

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 90678285.

It is a congruent number.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 72687 + ... + 73923.

Almost surely, 2^90678285 is an apocalyptic number.

It is an amenable number.

90678285 is a deficient number, since it is larger than the sum of its proper divisors (72901131).

90678285 is a wasteful number, since it uses less digits than its factorization.

90678285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1435 (or 1426 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 90678285 is about 9522.5146363763. The cubic root of 90678285 is about 449.2634617943.

The spelling of 90678285 in words is "ninety million, six hundred seventy-eight thousand, two hundred eighty-five".