90147918 has 32 divisors (see below), whose sum is σ = 207569664. Its totient is φ = 25566912.

The previous prime is 90147887. The next prime is 90147931. The reversal of 90147918 is 81974109.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2080 + ... + 13587.

It is an arithmetic number, because the mean of its divisors is an integer number (6486552).

Almost surely, 2^90147918 is an apocalyptic number.

90147918 is an abundant number, since it is smaller than the sum of its proper divisors (117421746).

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

90147918 is a wasteful number, since it uses less digits than its factorization.

90147918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15816.

The product of its (nonzero) digits is 18144, while the sum is 39.

The square root of 90147918 is about 9494.6257430190. The cubic root of 90147918 is about 448.3858515458.

The spelling of 90147918 in words is "ninety million, one hundred forty-seven thousand, nine hundred eighteen".