1340728863 has 32 divisors (see below), whose sum is σ = 1962005760. Its totient is φ = 811399680.

The previous prime is 1340728847. The next prime is 1340728867. The reversal of 1340728863 is 3688270431.

It is not a de Polignac number, because 1340728863 - 2⁴ = 1340728847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340728867) 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, 124743 + ... + 135063.

It is an arithmetic number, because the mean of its divisors is an integer number (61312680).

Almost surely, 2^1340728863 is an apocalyptic number.

1340728863 is a deficient number, since it is larger than the sum of its proper divisors (621276897).

1340728863 is a wasteful number, since it uses less digits than its factorization.

1340728863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10439.

The product of its (nonzero) digits is 193536, while the sum is 42.

The square root of 1340728863 is about 36615.9645919645. The cubic root of 1340728863 is about 1102.6736238609.

The spelling of 1340728863 in words is "one billion, three hundred forty million, seven hundred twenty-eight thousand, eight hundred sixty-three".