90115690 has 32 divisors (see below), whose sum is σ = 186076800. Its totient is φ = 30780864.

The previous prime is 90115661. The next prime is 90115693. The reversal of 90115690 is 9651109.

It is a super-2 number, since 2×90115690² = 16241675168352200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90115693) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17536 + ... + 22084.

It is an arithmetic number, because the mean of its divisors is an integer number (5814900).

Almost surely, 2^90115690 is an apocalyptic number.

90115690 is an abundant number, since it is smaller than the sum of its proper divisors (95961110).

90115690 is a wasteful number, since it uses less digits than its factorization.

90115690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4846.

The product of its (nonzero) digits is 2430, while the sum is 31.

The square root of 90115690 is about 9492.9284206719. The cubic root of 90115690 is about 448.3324123319.

Adding to 90115690 its reverse (9651109), we get a palindrome (99766799).

The spelling of 90115690 in words is "ninety million, one hundred fifteen thousand, six hundred ninety".