1340820868 has 24 divisors (see below), whose sum is σ = 2414051640. Its totient is φ = 651233280.

The previous prime is 1340820863. The next prime is 1340820869. The reversal of 1340820868 is 8680280431.

It can be written as a sum of positive squares in 4 ways, for example, as 22259524 + 1318561344 = 4718^2 + 36312^2 .

It is a hoax number, since the sum of its digits (40) 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 1340820868.

It is not an unprimeable number, because it can be changed into a prime (1340820863) 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, 20668 + ... + 55756.

It is an arithmetic number, because the mean of its divisors is an integer number (100585485).

Almost surely, 2^1340820868 is an apocalyptic number.

It is an amenable number.

1340820868 is a deficient number, since it is larger than the sum of its proper divisors (1073230772).

1340820868 is a wasteful number, since it uses less digits than its factorization.

1340820868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35367 (or 35365 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 40.

The square root of 1340820868 is about 36617.2209213097. The cubic root of 1340820868 is about 1102.6988462528.

The spelling of 1340820868 in words is "one billion, three hundred forty million, eight hundred twenty thousand, eight hundred sixty-eight".