1299318220 has 24 divisors (see below), whose sum is σ = 2755063584. Its totient is φ = 514680576.

The previous prime is 1299318217. The next prime is 1299318257. The reversal of 1299318220 is 228139921.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1299318220.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 313309 + ... + 317428.

It is an arithmetic number, because the mean of its divisors is an integer number (114794316).

Almost surely, 2^1299318220 is an apocalyptic number.

1299318220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1299318220 is an abundant number, since it is smaller than the sum of its proper divisors (1455745364).

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

1299318220 is a wasteful number, since it uses less digits than its factorization.

1299318220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630849 (or 630847 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 1299318220 is about 36046.0569272147. The cubic root of 1299318220 is about 1091.2020574313.

It can be divided in two parts, 12993 and 18220, that added together give a palindrome (31213).

The spelling of 1299318220 in words is "one billion, two hundred ninety-nine million, three hundred eighteen thousand, two hundred twenty".