1299618992 has 80 divisors (see below), whose sum is σ = 3152208960. Its totient is φ = 506118144.

The previous prime is 1299618977. The next prime is 1299619039. The reversal of 1299618992 is 2998169921.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43448 + ... + 66984.

It is an arithmetic number, because the mean of its divisors is an integer number (39402612).

Almost surely, 2^1299618992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1299618992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1576104480).

1299618992 is an abundant number, since it is smaller than the sum of its proper divisors (1852589968).

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

1299618992 is a wasteful number, since it uses less digits than its factorization.

1299618992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23598 (or 23592 counting only the distinct ones).

The product of its digits is 1259712, while the sum is 56.

The square root of 1299618992 is about 36050.2287371384. The cubic root of 1299618992 is about 1091.2862497149.

The spelling of 1299618992 in words is "one billion, two hundred ninety-nine million, six hundred eighteen thousand, nine hundred ninety-two".