340204240 has 20 divisors (see below), whose sum is σ = 790975044. Its totient is φ = 136081664.

The previous prime is 340204237. The next prime is 340204243. The reversal of 340204240 is 42402043.

It is an interprime number because it is at equal distance from previous prime (340204237) and next prime (340204243).

It can be written as a sum of positive squares in 2 ways, for example, as 125171344 + 215032896 = 11188^2 + 14664^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340204243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2126197 + ... + 2126356.

Almost surely, 2^340204240 is an apocalyptic number.

It is an amenable number.

340204240 is an abundant number, since it is smaller than the sum of its proper divisors (450770804).

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

340204240 is a wasteful number, since it uses less digits than its factorization.

340204240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4252566 (or 4252560 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 340204240 is about 18444.6263177111. The cubic root of 340204240 is about 698.0929315816.

Adding to 340204240 its reverse (42402043), we get a palindrome (382606283).

The spelling of 340204240 in words is "three hundred forty million, two hundred four thousand, two hundred forty".