90000002 has 16 divisors (see below), whose sum is σ = 138735072. Its totient is φ = 43762080.

The previous prime is 89999999. The next prime is 90000049. The reversal of 90000002 is 20000009.

It is not an unprimeable number, because it can be changed into a prime (2) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26873 + ... + 30035.

It is an arithmetic number, because the mean of its divisors is an integer number (8670942).

Almost surely, 2^90000002 is an apocalyptic number.

90000002 is a deficient number, since it is larger than the sum of its proper divisors (48735070).

90000002 is a wasteful number, since it uses less digits than its factorization.

90000002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3553.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 90000002 is about 9486.8330859144. The cubic root of 90000002 is about 448.1404779753.

Adding to 90000002 its reverse (20000009), we get a palindrome (110000011).

The spelling of 90000002 in words is "ninety million, two", and thus it is an aban number and an uban number.