1340339649 has 16 divisors (see below), whose sum is σ = 1960485120. Its totient is φ = 807785360.

The previous prime is 1340339621. The next prime is 1340339657. The reversal of 1340339649 is 9469330431.

It is a cyclic number.

It is not a de Polignac number, because 1340339649 - 2⁵ = 1340339617 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1340339649.

It is not an unprimeable number, because it can be changed into a prime (1340339699) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 107547 + ... + 119360.

It is an arithmetic number, because the mean of its divisors is an integer number (122530320).

Almost surely, 2^1340339649 is an apocalyptic number.

It is an amenable number.

1340339649 is a deficient number, since it is larger than the sum of its proper divisors (620145471).

1340339649 is a wasteful number, since it uses less digits than its factorization.

1340339649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227100.

The product of its (nonzero) digits is 209952, while the sum is 42.

The square root of 1340339649 is about 36610.6493933118. The cubic root of 1340339649 is about 1102.5669113704.

The spelling of 1340339649 in words is "one billion, three hundred forty million, three hundred thirty-nine thousand, six hundred forty-nine".