340538 has 16 divisors (see below), whose sum is σ = 582336. Its totient is φ = 147840.

The previous prime is 340519. The next prime is 340541. The reversal of 340538 is 835043.

It is a super-2 number, since 2×340538² = 231932258888, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170 + ... + 842.

It is an arithmetic number, because the mean of its divisors is an integer number (36396).

2³⁴⁰⁵³⁸ is an apocalyptic number.

340538 is a deficient number, since it is larger than the sum of its proper divisors (241798).

340538 is a wasteful number, since it uses less digits than its factorization.

340538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 340538 is about 583.5563383256. The cubic root of 340538 is about 69.8321146790.

It can be divided in two parts, 3405 and 38, that added together give a palindrome (3443).

The spelling of 340538 in words is "three hundred forty thousand, five hundred thirty-eight".