90023018 has 8 divisors (see below), whose sum is σ = 139690980. Its totient is φ = 43459360.

The previous prime is 90022997. The next prime is 90023053. The reversal of 90023018 is 81032009.

It can be written as a sum of positive squares in 2 ways, for example, as 83484769 + 6538249 = 9137^2 + 2557^2 .

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 90022984 and 90023002.

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, 776003 + ... + 776118.

Almost surely, 2^90023018 is an apocalyptic number.

90023018 is a deficient number, since it is larger than the sum of its proper divisors (49667962).

90023018 is a wasteful number, since it uses less digits than its factorization.

90023018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1552152.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 90023018 is about 9488.0460580670. The cubic root of 90023018 is about 448.1786762045.

The spelling of 90023018 in words is "ninety million, twenty-three thousand, eighteen".