1999672560 has 120 divisors (see below), whose sum is σ = 6726005520. Its totient is φ = 532417536.

The previous prime is 1999672523. The next prime is 1999672567. The reversal of 1999672560 is 652769991.

1999672560 is a `hidden beast` number, since 1 + 9 + 9 + 9 + 6 + 72 + 560 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a junction number, because it is equal to n+sod(n) for n = 1999672497 and 1999672506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1999672567) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 564876 + ... + 568404.

It is an arithmetic number, because the mean of its divisors is an integer number (56050046).

Almost surely, 2^1999672560 is an apocalyptic number.

1999672560 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 1999672560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3363002760).

1999672560 is an abundant number, since it is smaller than the sum of its proper divisors (4726332960).

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

1999672560 is a wasteful number, since it uses less digits than its factorization.

1999672560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4335 (or 4326 counting only the distinct ones).

The product of its (nonzero) digits is 1837080, while the sum is 54.

The square root of 1999672560 is about 44717.6985096505. The cubic root of 1999672560 is about 1259.8522880507.

The spelling of 1999672560 in words is "one billion, nine hundred ninety-nine million, six hundred seventy-two thousand, five hundred sixty".