1990687160 has 96 divisors (see below), whose sum is σ = 5626666080. Its totient is φ = 620463360.

The previous prime is 1990687159. The next prime is 1990687187. The reversal of 1990687160 is 617860991.

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 23 ways as a sum of consecutive naturals, for example, 4502 + ... + 63258.

It is an arithmetic number, because the mean of its divisors is an integer number (58611105).

Almost surely, 2^1990687160 is an apocalyptic number.

1990687160 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 1990687160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2813333040).

1990687160 is an abundant number, since it is smaller than the sum of its proper divisors (3635978920).

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

1990687160 is a wasteful number, since it uses less digits than its factorization.

1990687160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58797 (or 58782 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 47.

The square root of 1990687160 is about 44617.1173430109. The cubic root of 1990687160 is about 1257.9624328355.

The spelling of 1990687160 in words is "one billion, nine hundred ninety million, six hundred eighty-seven thousand, one hundred sixty".