90018722 has 8 divisors (see below), whose sum is σ = 135068700. Its totient is φ = 44995824.

The previous prime is 90018703. The next prime is 90018767. The reversal of 90018722 is 22781009.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 89851441 + 167281 = 9479^2 + 409^2 .

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

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, 7904 + ... + 15572.

Almost surely, 2^90018722 is an apocalyptic number.

90018722 is a deficient number, since it is larger than the sum of its proper divisors (45049978).

90018722 is a wasteful number, since it uses less digits than its factorization.

90018722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13540.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 90018722 is about 9487.8196652339. The cubic root of 90018722 is about 448.1715468937.

The spelling of 90018722 in words is "ninety million, eighteen thousand, seven hundred twenty-two".