1299445884 has 72 divisors (see below), whose sum is σ = 3601726128. Its totient is φ = 391749120.

The previous prime is 1299445831. The next prime is 1299445907. The reversal of 1299445884 is 4885449921.

It is a happy number.

1299445884 is a `hidden beast` number, since 1 + 29 + 94 + 458 + 84 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1299445884.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 69684 + ... + 86340.

It is an arithmetic number, because the mean of its divisors is an integer number (50023974).

Almost surely, 2^1299445884 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 1299445884, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1800863064).

1299445884 is an abundant number, since it is smaller than the sum of its proper divisors (2302280244).

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

1299445884 is a wasteful number, since it uses less digits than its factorization.

1299445884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16875 (or 16870 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 54.

The square root of 1299445884 is about 36047.8277292821. The cubic root of 1299445884 is about 1091.2377948037.

The spelling of 1299445884 in words is "one billion, two hundred ninety-nine million, four hundred forty-five thousand, eight hundred eighty-four".