1340244399 has 8 divisors (see below), whose sum is σ = 1924453552. Its totient is φ = 824765760.

The previous prime is 1340244397. The next prime is 1340244457. The reversal of 1340244399 is 9934420431.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1340244399 - 2¹ = 1340244397 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 34365241 = 1340244399 / (1 + 3 + 4 + 0 + 2 + 4 + 4 + 3 + 9 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340244397) 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 7 ways as a sum of consecutive naturals, for example, 17182582 + ... + 17182659.

It is an arithmetic number, because the mean of its divisors is an integer number (240556694).

Almost surely, 2^1340244399 is an apocalyptic number.

1340244399 is a deficient number, since it is larger than the sum of its proper divisors (584209153).

1340244399 is a wasteful number, since it uses less digits than its factorization.

1340244399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34365257.

The product of its (nonzero) digits is 93312, while the sum is 39.

The square root of 1340244399 is about 36609.3485191966. The cubic root of 1340244399 is about 1102.5407931184.

The spelling of 1340244399 in words is "one billion, three hundred forty million, two hundred forty-four thousand, three hundred ninety-nine".