1989976032 has 192 divisors, whose sum is σ = 6504019200. Its totient is φ = 586621440.

The previous prime is 1989976019. The next prime is 1989976091. The reversal of 1989976032 is 2306799891.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 1989976032.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 348819 + ... + 354477.

It is an arithmetic number, because the mean of its divisors is an integer number (33875100).

Almost surely, 2^1989976032 is an apocalyptic number.

1989976032 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 1989976032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3252009600).

1989976032 is an abundant number, since it is smaller than the sum of its proper divisors (4514043168).

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

1989976032 is a wasteful number, since it uses less digits than its factorization.

1989976032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5726 (or 5712 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 54.

The square root of 1989976032 is about 44609.1474027469. The cubic root of 1989976032 is about 1257.8126221119.

The spelling of 1989976032 in words is "one billion, nine hundred eighty-nine million, nine hundred seventy-six thousand, thirty-two".