90000010 has 16 divisors (see below), whose sum is σ = 164656872. Its totient is φ = 35409600.

The previous prime is 89999999. The next prime is 90000049. The reversal of 90000010 is 1000009.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 20894041 + 69105969 = 4571^2 + 8313^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73161 + ... + 74380.

Almost surely, 2^90000010 is an apocalyptic number.

90000010 is a deficient number, since it is larger than the sum of its proper divisors (74656862).

90000010 is a wasteful number, since it uses less digits than its factorization.

90000010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147609.

The product of its (nonzero) digits is 9, while the sum is 10.

The square root of 90000010 is about 9486.8335075514. The cubic root of 90000010 is about 448.1404912535.

Adding to 90000010 its reverse (1000009), we get a palindrome (91000019).

The spelling of 90000010 in words is "ninety million, ten", and thus it is an aban number and an uban number.