340445313 has 12 divisors (see below), whose sum is σ = 529581780. Its totient is φ = 209504736.

The previous prime is 340445309. The next prime is 340445327. The reversal of 340445313 is 313544043.

340445313 is a `hidden beast` number, since 340 + 4 + 4 + 5 + 313 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 102576384 + 237868929 = 10128^2 + 15423^2 .

It is not a de Polignac number, because 340445313 - 2² = 340445309 is a prime.

It is a super-2 number, since 2×340445313² = 231806022287335938, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (340445113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1454778 + ... + 1455011.

It is an arithmetic number, because the mean of its divisors is an integer number (44131815).

Almost surely, 2^340445313 is an apocalyptic number.

It is an amenable number.

340445313 is a deficient number, since it is larger than the sum of its proper divisors (189136467).

340445313 is a wasteful number, since it uses less digits than its factorization.

340445313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2909808 (or 2909805 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

The square root of 340445313 is about 18451.1602074233. The cubic root of 340445313 is about 698.2577851235.

Adding to 340445313 its reverse (313544043), we get a palindrome (653989356).

The spelling of 340445313 in words is "three hundred forty million, four hundred forty-five thousand, three hundred thirteen".