1999562880 has 256 divisors, whose sum is σ = 7482850560. Its totient is φ = 444579840.

The previous prime is 1999562879. The next prime is 1999562881. The reversal of 1999562880 is 882659991.

It is an interprime number because it is at equal distance from previous prime (1999562879) and next prime (1999562881).

It is a super-2 number, since 2×1999562880² = 7996503422147788800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1999562880.

It is not an unprimeable number, because it can be changed into a prime (1999562881) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 495270 + ... + 499290.

It is an arithmetic number, because the mean of its divisors is an integer number (29229885).

Almost surely, 2^1999562880 is an apocalyptic number.

1999562880 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 1999562880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3741425280).

1999562880 is an abundant number, since it is smaller than the sum of its proper divisors (5483287680).

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

1999562880 is a wasteful number, since it uses less digits than its factorization.

1999562880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4087 (or 4075 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 57.

The square root of 1999562880 is about 44716.4721327611. The cubic root of 1999562880 is about 1259.8292537587.

The spelling of 1999562880 in words is "one billion, nine hundred ninety-nine million, five hundred sixty-two thousand, eight hundred eighty".