1989696000 has 320 divisors, whose sum is σ = 6797172096. Its totient is φ = 516096000.

The previous prime is 1989695993. The next prime is 1989696001. The reversal of 1989696000 is 6969891.

It is a tau number, because it is divible by the number of its divisors (320).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (1989696001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8255880 + ... + 8256120.

Almost surely, 2^1989696000 is an apocalyptic number.

1989696000 is a gapful number since it is divisible by the number (10) 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 1989696000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3398586048).

1989696000 is an abundant number, since it is smaller than the sum of its proper divisors (4807476096).

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

1989696000 is an equidigital number, since it uses as much as digits as its factorization.

1989696000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320 (or 294 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 48.

The square root of 1989696000 is about 44606.0085638695. The cubic root of 1989696000 is about 1257.7536190047.

The spelling of 1989696000 in words is "one billion, nine hundred eighty-nine million, six hundred ninety-six thousand".