90000690 has 32 divisors (see below), whose sum is σ = 232618176. Its totient is φ = 22153920.

The previous prime is 90000683. The next prime is 90000697. The reversal of 90000690 is 9600009.

It is an interprime number because it is at equal distance from previous prime (90000683) and next prime (90000697).

It is a super-2 number, since 2×90000690² = 16200248400952200, 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 90000690.

It is not an unprimeable number, because it can be changed into a prime (90000697) 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, 114996 + ... + 115775.

It is an arithmetic number, because the mean of its divisors is an integer number (7269318).

Almost surely, 2^90000690 is an apocalyptic number.

90000690 is an abundant number, since it is smaller than the sum of its proper divisors (142617486).

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

90000690 is a wasteful number, since it uses less digits than its factorization.

90000690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230794.

The product of its (nonzero) digits is 486, while the sum is 24.

The square root of 90000690 is about 9486.8693466285. The cubic root of 90000690 is about 448.1416199007.

Adding to 90000690 its reverse (9600009), we get a palindrome (99600699).

The spelling of 90000690 in words is "ninety million, six hundred ninety", and thus it is an aban number.