90389115 has 40 divisors (see below), whose sum is σ = 165127248. Its totient is φ = 47286720.

The previous prime is 90389081. The next prime is 90389141. The reversal of 90389115 is 51198309.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-90389115 is a prime.

It is a super-2 number, since 2×90389115² = 16340384220966450, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 90389115.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 19360 + ... + 23570.

Almost surely, 2^90389115 is an apocalyptic number.

90389115 is a deficient number, since it is larger than the sum of its proper divisors (74738133).

90389115 is a wasteful number, since it uses less digits than its factorization.

90389115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4281 (or 4272 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 36.

The square root of 90389115 is about 9507.3190227319. The cubic root of 90389115 is about 448.7853912286.

The spelling of 90389115 in words is "ninety million, three hundred eighty-nine thousand, one hundred fifteen".