1299344220 has 96 divisors (see below), whose sum is σ = 4049740800. Its totient is φ = 345863232.

The previous prime is 1299344209. The next prime is 1299344227. The reversal of 1299344220 is 224439921.

1299344220 is a `hidden beast` number, since 1 + 2 + 99 + 344 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1299344227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 347521 + ... + 351239.

It is an arithmetic number, because the mean of its divisors is an integer number (42184800).

Almost surely, 2^1299344220 is an apocalyptic number.

1299344220 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 1299344220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2024870400).

1299344220 is an abundant number, since it is smaller than the sum of its proper divisors (2750396580).

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

1299344220 is a wasteful number, since it uses less digits than its factorization.

1299344220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4384 (or 4376 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 1299344220 is about 36046.4175751211. The cubic root of 1299344220 is about 1091.2093358804.

The spelling of 1299344220 in words is "one billion, two hundred ninety-nine million, three hundred forty-four thousand, two hundred twenty".