1340803905 has 48 divisors (see below), whose sum is σ = 2503166400. Its totient is φ = 611065728.

The previous prime is 1340803901. The next prime is 1340803927. The reversal of 1340803905 is 5093080431.

1340803905 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1340803905 - 2² = 1340803901 is a prime.

It is a super-2 number, since 2×1340803905² = 3595510223326498050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1340803901) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 253902 + ... + 259128.

It is an arithmetic number, because the mean of its divisors is an integer number (52149300).

Almost surely, 2^1340803905 is an apocalyptic number.

1340803905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1340803905 is a deficient number, since it is larger than the sum of its proper divisors (1162362495).

1340803905 is a wasteful number, since it uses less digits than its factorization.

1340803905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5598 (or 5591 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 1340803905 is about 36616.9892945884. The cubic root of 1340803905 is about 1102.6941960767.

The spelling of 1340803905 in words is "one billion, three hundred forty million, eight hundred three thousand, nine hundred five".