1299499680 has 192 divisors, whose sum is σ = 4360003200. Its totient is φ = 324403200.

The previous prime is 1299499679. The next prime is 1299499727. The reversal of 1299499680 is 869949921.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a self number, because there is not a number n which added to its sum of digits gives 1299499680.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 810880 + ... + 812480.

It is an arithmetic number, because the mean of its divisors is an integer number (22708350).

Almost surely, 2^1299499680 is an apocalyptic number.

1299499680 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 1299499680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2180001600).

1299499680 is an abundant number, since it is smaller than the sum of its proper divisors (3060503520).

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

1299499680 is a wasteful number, since it uses less digits than its factorization.

1299499680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1727 (or 1719 counting only the distinct ones).

The product of its (nonzero) digits is 2519424, while the sum is 57.

The square root of 1299499680 is about 36048.5738968964. The cubic root of 1299499680 is about 1091.2528533809.

The spelling of 1299499680 in words is "one billion, two hundred ninety-nine million, four hundred ninety-nine thousand, six hundred eighty".