340731 has 18 divisors (see below), whose sum is σ = 526812. Its totient is φ = 212160.

The previous prime is 340723. The next prime is 340757. The reversal of 340731 is 137043.

It is not a de Polignac number, because 340731 - 2³ = 340723 is a prime.

It is a super-2 number, since 2×340731² = 232195228722, which contains 22 as substring.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 340731.

It is not an unprimeable number, because it can be changed into a prime (340031) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2536 + ... + 2666.

2³⁴⁰⁷³¹ is an apocalyptic number.

340731 is a deficient number, since it is larger than the sum of its proper divisors (186081).

340731 is a wasteful number, since it uses less digits than its factorization.

340731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171 (or 151 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 18.

The square root of 340731 is about 583.7216802552. The cubic root of 340731 is about 69.8453046439.

Adding to 340731 its reverse (137043), we get a palindrome (477774).

The spelling of 340731 in words is "three hundred forty thousand, seven hundred thirty-one".