9004090090 has 32 divisors (see below), whose sum is σ = 16312867344. Its totient is φ = 3578265600.

The previous prime is 9004090037. The next prime is 9004090091. The reversal of 9004090090 is 900904009.

It can be written as a sum of positive squares in 8 ways, for example, as 8475595969 + 528494121 = 92063^2 + 22989^2 .

It is not an unprimeable number, because it can be changed into a prime (9004090091) 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, 1026202 + ... + 1034938.

Almost surely, 2^9004090090 is an apocalyptic number.

9004090090 is a deficient number, since it is larger than the sum of its proper divisors (7308777254).

9004090090 is a wasteful number, since it uses less digits than its factorization.

9004090090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9402.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 9004090090 is about 94889.8840235354. The cubic root of 9004090090 is about 2080.3988764437.

Adding to 9004090090 its reverse (900904009), we get a palindrome (9904994099).

The spelling of 9004090090 in words is "nine billion, four million, ninety thousand, ninety".