1340779205 has 16 divisors (see below), whose sum is σ = 1705742064. Its totient is φ = 1008245760.

The previous prime is 1340779183. The next prime is 1340779211. The reversal of 1340779205 is 5029770431.

It can be written as a sum of positive squares in 8 ways, for example, as 87123556 + 1253655649 = 9334^2 + 35407^2 .

It is not a de Polignac number, because 1340779205 - 2¹⁶ = 1340713669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60179 + ... + 79391.

It is an arithmetic number, because the mean of its divisors is an integer number (106608879).

Almost surely, 2^1340779205 is an apocalyptic number.

It is an amenable number.

1340779205 is a deficient number, since it is larger than the sum of its proper divisors (364962859).

1340779205 is a wasteful number, since it uses less digits than its factorization.

1340779205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20056.

The product of its (nonzero) digits is 52920, while the sum is 38.

The square root of 1340779205 is about 36616.6520179003. The cubic root of 1340779205 is about 1102.6874248370.

The spelling of 1340779205 in words is "one billion, three hundred forty million, seven hundred seventy-nine thousand, two hundred five".