90813858 has 8 divisors (see below), whose sum is σ = 181627728. Its totient is φ = 30271284.

The previous prime is 90813829. The next prime is 90813859. The reversal of 90813858 is 85831809.

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

90813858 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (90813859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7567816 + ... + 7567827.

It is an arithmetic number, because the mean of its divisors is an integer number (22703466).

Almost surely, 2^90813858 is an apocalyptic number.

90813858 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

90813858 is a wasteful number, since it uses less digits than its factorization.

90813858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15135648.

The product of its (nonzero) digits is 69120, while the sum is 42.

The square root of 90813858 is about 9529.6305279901. The cubic root of 90813858 is about 449.4872480661.

The spelling of 90813858 in words is "ninety million, eight hundred thirteen thousand, eight hundred fifty-eight".