1299162880 has 144 divisors (see below), whose sum is σ = 3325996800. Its totient is φ = 485130240.

The previous prime is 1299162803. The next prime is 1299162881. The reversal of 1299162880 is 882619921.

It is a self number, because there is not a number n which added to its sum of digits gives 1299162880.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1299162881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1150156 + ... + 1151284.

It is an arithmetic number, because the mean of its divisors is an integer number (23097200).

Almost surely, 2^1299162880 is an apocalyptic number.

1299162880 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 1299162880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1662998400).

1299162880 is an abundant number, since it is smaller than the sum of its proper divisors (2026833920).

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

1299162880 is a wasteful number, since it uses less digits than its factorization.

1299162880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1210 (or 1196 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 46.

The square root of 1299162880 is about 36043.9021194987. The cubic root of 1299162880 is about 1091.1585694747.

The spelling of 1299162880 in words is "one billion, two hundred ninety-nine million, one hundred sixty-two thousand, eight hundred eighty".