1999022160 has 80 divisors (see below), whose sum is σ = 6207727680. Its totient is φ = 532147200.

The previous prime is 1999022159. The next prime is 1999022173. The reversal of 1999022160 is 612209991.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137311 + ... + 151169.

It is an arithmetic number, because the mean of its divisors is an integer number (77596596).

Almost surely, 2^1999022160 is an apocalyptic number.

1999022160 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 1999022160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3103863840).

1999022160 is an abundant number, since it is smaller than the sum of its proper divisors (4208705520).

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

1999022160 is a wasteful number, since it uses less digits than its factorization.

1999022160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14476 (or 14470 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 39.

The square root of 1999022160 is about 44710.4256298237. The cubic root of 1999022160 is about 1259.7156828887.

The spelling of 1999022160 in words is "one billion, nine hundred ninety-nine million, twenty-two thousand, one hundred sixty".