340340646 has 32 divisors (see below), whose sum is σ = 723945600. Its totient is φ = 106295936.

The previous prime is 340340641. The next prime is 340340647. The reversal of 340340646 is 646043043.

340340646 = 419² + 420² + ... + 1030².

340340646 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340340641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15805 + ... + 30503.

It is an arithmetic number, because the mean of its divisors is an integer number (22623300).

Almost surely, 2^340340646 is an apocalyptic number.

340340646 is an abundant number, since it is smaller than the sum of its proper divisors (383604954).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

340340646 is a wasteful number, since it uses less digits than its factorization.

340340646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14948.

The product of its (nonzero) digits is 20736, while the sum is 30.

The square root of 340340646 is about 18448.3236636828. The cubic root of 340340646 is about 698.1862199941.

Adding to 340340646 its reverse (646043043), we get a palindrome (986383689).

The spelling of 340340646 in words is "three hundred forty million, three hundred forty thousand, six hundred forty-six".