1999488560 has 40 divisors (see below), whose sum is σ = 4893488880. Its totient is φ = 757700352.

The previous prime is 1999488521. The next prime is 1999488577. The reversal of 1999488560 is 658849991.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 1999488560.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 656207 + ... + 659246.

It is an arithmetic number, because the mean of its divisors is an integer number (122337222).

Almost surely, 2^1999488560 is an apocalyptic number.

1999488560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1999488560 is an abundant number, since it is smaller than the sum of its proper divisors (2894000320).

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

1999488560 is a wasteful number, since it uses less digits than its factorization.

1999488560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315485 (or 1315479 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 59.

The square root of 1999488560 is about 44715.6411113606. The cubic root of 1999488560 is about 1259.8136450689.

The spelling of 1999488560 in words is "one billion, nine hundred ninety-nine million, four hundred eighty-eight thousand, five hundred sixty".