340720331 has 8 divisors (see below), whose sum is σ = 409889280. Its totient is φ = 276675048.

The previous prime is 340720277. The next prime is 340720337. The reversal of 340720331 is 133027043.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 340720331 - 2¹⁸ = 340458187 is a prime.

It is a super-2 number, since 2×340720331² = 232180687913499122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 340720297 and 340720306.

It is not an unprimeable number, because it can be changed into a prime (340720337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1280771 + ... + 1281036.

It is an arithmetic number, because the mean of its divisors is an integer number (51236160).

Almost surely, 2^340720331 is an apocalyptic number.

340720331 is a deficient number, since it is larger than the sum of its proper divisors (69168949).

340720331 is a wasteful number, since it uses less digits than its factorization.

340720331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2561833.

The product of its (nonzero) digits is 1512, while the sum is 23.

The square root of 340720331 is about 18458.6112966279. The cubic root of 340720331 is about 698.4457563541.

Adding to 340720331 its reverse (133027043), we get a palindrome (473747374).

The spelling of 340720331 in words is "three hundred forty million, seven hundred twenty thousand, three hundred thirty-one".