90906858 has 36 divisors (see below), whose sum is σ = 229124610. Its totient is φ = 25973136.

The previous prime is 90906853. The next prime is 90906863. The reversal of 90906858 is 85860909.

It is an interprime number because it is at equal distance from previous prime (90906853) and next prime (90906863).

It can be written as a sum of positive squares in only one way, i.e., 62678889 + 28227969 = 7917^2 + 5313^2 .

It is not an unprimeable number, because it can be changed into a prime (90906853) by changing a digit.

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 17 ways as a sum of consecutive naturals, for example, 50653 + ... + 52416.

Almost surely, 2^90906858 is an apocalyptic number.

90906858 is a gapful number since it is divisible by the number (98) formed by its first and last digit.

90906858 is an abundant number, since it is smaller than the sum of its proper divisors (138217752).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90906858 is a wasteful number, since it uses less digits than its factorization.

90906858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103091 (or 103081 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The square root of 90906858 is about 9534.5087969963. The cubic root of 90906858 is about 449.6406316046.

The spelling of 90906858 in words is "ninety million, nine hundred six thousand, eight hundred fifty-eight".