1999297080 has 448 divisors, whose sum is σ = 7705912320. Its totient is φ = 461894400.

The previous prime is 1999297073. The next prime is 1999297093. The reversal of 1999297080 is 807929991.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 7377345 + ... + 7377615.

Almost surely, 2^1999297080 is an apocalyptic number.

1999297080 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 1999297080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3852956160).

1999297080 is an abundant number, since it is smaller than the sum of its proper divisors (5706615240).

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

1999297080 is a wasteful number, since it uses less digits than its factorization.

1999297080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334 (or 315 counting only the distinct ones).

The product of its (nonzero) digits is 734832, while the sum is 54.

The square root of 1999297080 is about 44713.4999748398. The cubic root of 1999297080 is about 1259.7734286485.

The spelling of 1999297080 in words is "one billion, nine hundred ninety-nine million, two hundred ninety-seven thousand, eighty".