900000002 has 16 divisors (see below), whose sum is σ = 1475128800. Its totient is φ = 408423840.

The previous prime is 899999963. The next prime is 900000011. The reversal of 900000002 is 200000009.

It is a Harshad number since it is a multiple of its sum of digits (11).

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

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, 19427 + ... + 46662.

It is an arithmetic number, because the mean of its divisors is an integer number (92195550).

Almost surely, 2^900000002 is an apocalyptic number.

900000002 is a deficient number, since it is larger than the sum of its proper divisors (575128798).

900000002 is a wasteful number, since it uses less digits than its factorization.

900000002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66721.

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

The square root of 900000002 is about 30000.0000333333. Note that the first 4 decimals coincide. The cubic root of 900000002 is about 965.4893853208.

Adding to 900000002 its reverse (200000009), we get a palindrome (1100000011).

The spelling of 900000002 in words is "nine hundred million, two", and thus it is an aban number.