1989000102 has 32 divisors (see below), whose sum is σ = 4251388032. Its totient is φ = 618164864.

The previous prime is 1989000031. The next prime is 1989000103. The reversal of 1989000102 is 2010009891.

It is a super-2 number, since 2×1989000102² = 7912242811512020808, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1989000102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1989000103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80208 + ... + 102035.

It is an arithmetic number, because the mean of its divisors is an integer number (132855876).

Almost surely, 2^1989000102 is an apocalyptic number.

1989000102 is an abundant number, since it is smaller than the sum of its proper divisors (2262387930).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1989000102 is a wasteful number, since it uses less digits than its factorization.

1989000102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182372.

The product of its (nonzero) digits is 1296, while the sum is 30.

The square root of 1989000102 is about 44598.2073854993. The cubic root of 1989000102 is about 1257.6069684125.

Adding to 1989000102 its reverse (2010009891), we get a palindrome (3999009993).

The spelling of 1989000102 in words is "one billion, nine hundred eighty-nine million, one hundred two", and thus it is an aban number.