1989372672 has 432 divisors, whose sum is σ = 7101739008. Its totient is φ = 523100160.

The previous prime is 1989372667. The next prime is 1989372689. The reversal of 1989372672 is 2762739891.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11499178 + ... + 11499350.

Almost surely, 2^1989372672 is an apocalyptic number.

1989372672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1989372672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3550869504).

1989372672 is an abundant number, since it is smaller than the sum of its proper divisors (5112366336).

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

1989372672 is a wasteful number, since it uses less digits than its factorization.

1989372672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256 (or 239 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 54.

The square root of 1989372672 is about 44602.3841515227. The cubic root of 1989372672 is about 1257.6854864873.

The spelling of 1989372672 in words is "one billion, nine hundred eighty-nine million, three hundred seventy-two thousand, six hundred seventy-two".