340404239 has 16 divisors (see below), whose sum is σ = 394108416. Its totient is φ = 287988000.

The previous prime is 340404227. The next prime is 340404241. The reversal of 340404239 is 932404043.

It is a cyclic number.

It is not a de Polignac number, because 340404239 - 2²⁸ = 71968783 is a prime.

It is a super-3 number, since 3×340404239³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340404269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 329654 + ... + 330684.

It is an arithmetic number, because the mean of its divisors is an integer number (24631776).

Almost surely, 2^340404239 is an apocalyptic number.

340404239 is a deficient number, since it is larger than the sum of its proper divisors (53704177).

340404239 is a wasteful number, since it uses less digits than its factorization.

340404239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1606.

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 340404239 is about 18450.0471273111. The cubic root of 340404239 is about 698.2297028906.

The spelling of 340404239 in words is "three hundred forty million, four hundred four thousand, two hundred thirty-nine".