1989864030 has 96 divisors (see below), whose sum is σ = 6060458880. Its totient is φ = 413474880.

The previous prime is 1989864013. The next prime is 1989864089. The reversal of 1989864030 is 304689891.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 45360 + ... + 77699.

It is an arithmetic number, because the mean of its divisors is an integer number (63129780).

Almost surely, 2^1989864030 is an apocalyptic number.

1989864030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1989864030 is an abundant number, since it is smaller than the sum of its proper divisors (4070594850).

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

1989864030 is a wasteful number, since it uses less digits than its factorization.

1989864030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123094 (or 123087 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 48.

The square root of 1989864030 is about 44607.8920147545. The cubic root of 1989864030 is about 1257.7890238088.

The spelling of 1989864030 in words is "one billion, nine hundred eighty-nine million, eight hundred sixty-four thousand, thirty".