1989000002 has 32 divisors (see below), whose sum is σ = 3351110400. Its totient is φ = 877579920.

The previous prime is 1989000001. The next prime is 1989000007. The reversal of 1989000002 is 2000009891.

It is a super-2 number, since 2×1989000002² = 7912242015912000008, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1989000001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147749 + ... + 160647.

It is an arithmetic number, because the mean of its divisors is an integer number (104722200).

Almost surely, 2^1989000002 is an apocalyptic number.

1989000002 is a deficient number, since it is larger than the sum of its proper divisors (1362110398).

1989000002 is a wasteful number, since it uses less digits than its factorization.

1989000002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13118.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 1989000002 is about 44598.2062643779. The cubic root of 1989000002 is about 1257.6069473365.

Adding to 1989000002 its reverse (2000009891), we get a palindrome (3989009893).

The spelling of 1989000002 in words is "one billion, nine hundred eighty-nine million, two", and thus it is an aban number.