340426 has 4 divisors (see below), whose sum is σ = 510642. Its totient is φ = 170212.

The previous prime is 340409. The next prime is 340429. The reversal of 340426 is 624043.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 330625 + 9801 = 575^2 + 99^2 .

It is a super-2 number, since 2×340426² = 231779722952, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (340429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85105 + ... + 85108.

2³⁴⁰⁴²⁶ is an apocalyptic number.

340426 is a deficient number, since it is larger than the sum of its proper divisors (170216).

340426 is a wasteful number, since it uses less digits than its factorization.

340426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170215.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 340426 is about 583.4603671202. The cubic root of 340426 is about 69.8244581135.

Adding to 340426 its reverse (624043), we get a palindrome (964469).

It can be divided in two parts, 3 and 40426, that multiplied together give a triangular number (121278 = T₄₉₂).

The spelling of 340426 in words is "three hundred forty thousand, four hundred twenty-six".