1989108810 has 96 divisors (see below), whose sum is σ = 5582304000. Its totient is φ = 488502144.

The previous prime is 1989108773. The next prime is 1989108853. The reversal of 1989108810 is 188019891.

It is a super-2 number, since 2×1989108810² = 7913107716039232200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 582127 + ... + 585533.

It is an arithmetic number, because the mean of its divisors is an integer number (58149000).

Almost surely, 2^1989108810 is an apocalyptic number.

1989108810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1989108810, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2791152000).

1989108810 is an abundant number, since it is smaller than the sum of its proper divisors (3593195190).

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

1989108810 is a wasteful number, since it uses less digits than its factorization.

1989108810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3932 (or 3929 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 45.

The square root of 1989108810 is about 44599.4261173841. The cubic root of 1989108810 is about 1257.6298793294.

The spelling of 1989108810 in words is "one billion, nine hundred eighty-nine million, one hundred eight thousand, eight hundred ten".