90015690 has 16 divisors (see below), whose sum is σ = 216037728. Its totient is φ = 24004176.

The previous prime is 90015689. The next prime is 90015701. The reversal of 90015690 is 9651009.

It is a super-2 number, since 2×90015690² = 16205648892352200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 3000523 = 90015690 / (9 + 0 + 0 + 1 + 5 + 6 + 9 + 0).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1500232 + ... + 1500291.

It is an arithmetic number, because the mean of its divisors is an integer number (13502358).

Almost surely, 2^90015690 is an apocalyptic number.

90015690 is an abundant number, since it is smaller than the sum of its proper divisors (126022038).

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

90015690 is a wasteful number, since it uses less digits than its factorization.

90015690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3000533.

The product of its (nonzero) digits is 2430, while the sum is 30.

The square root of 90015690 is about 9487.6598800758. The cubic root of 90015690 is about 448.1665150835.

Adding to 90015690 its reverse (9651009), we get a palindrome (99666699).

The spelling of 90015690 in words is "ninety million, fifteen thousand, six hundred ninety".