90890678 has 12 divisors (see below), whose sum is σ = 137148612. Its totient is φ = 45176040.

The previous prime is 90890633. The next prime is 90890689. The reversal of 90890678 is 87609809.

It is a super-2 number, since 2×90890678² = 16522230694599368, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 77033 + ... + 78203.

It is an arithmetic number, because the mean of its divisors is an integer number (11429051).

Almost surely, 2^90890678 is an apocalyptic number.

90890678 is a deficient number, since it is larger than the sum of its proper divisors (46257934).

90890678 is a wasteful number, since it uses less digits than its factorization.

90890678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1567 (or 1370 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 90890678 is about 9533.6602624595. The cubic root of 90890678 is about 449.6139536867.

The spelling of 90890678 in words is "ninety million, eight hundred ninety thousand, six hundred seventy-eight".