90118542 has 8 divisors (see below), whose sum is σ = 180237096. Its totient is φ = 30039512.

The previous prime is 90118507. The next prime is 90118591. The reversal of 90118542 is 24581109.

It is a happy number.

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

90118542 is an admirable number.

It is a super-2 number, since 2×90118542² = 16242703224411528, 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 3 ways as a sum of consecutive naturals, for example, 7509873 + ... + 7509884.

It is an arithmetic number, because the mean of its divisors is an integer number (22529637).

Almost surely, 2^90118542 is an apocalyptic number.

90118542 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.

90118542 is a wasteful number, since it uses less digits than its factorization.

90118542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15019762.

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 90118542 is about 9493.0786365646. The cubic root of 90118542 is about 448.3371419210.

The spelling of 90118542 in words is "ninety million, one hundred eighteen thousand, five hundred forty-two".