1299340386 has 64 divisors (see below), whose sum is σ = 3008332800. Its totient is φ = 415238400.

The previous prime is 1299340363. The next prime is 1299340387. The reversal of 1299340386 is 6830439921.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1299340387) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 178906 + ... + 186026.

It is an arithmetic number, because the mean of its divisors is an integer number (47005200).

Almost surely, 2^1299340386 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1299340386, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1504166400).

1299340386 is an abundant number, since it is smaller than the sum of its proper divisors (1708992414).

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

1299340386 is a wasteful number, since it uses less digits than its factorization.

1299340386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7272 (or 7266 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 1299340386 is about 36046.3643936528. The cubic root of 1299340386 is about 1091.2082625952.

The spelling of 1299340386 in words is "one billion, two hundred ninety-nine million, three hundred forty thousand, three hundred eighty-six".