340204431 has 16 divisors (see below), whose sum is σ = 540946944. Its totient is φ = 185949984.

The previous prime is 340204421. The next prime is 340204441. The reversal of 340204431 is 134402043.

It is an interprime number because it is at equal distance from previous prime (340204421) and next prime (340204441).

It is not a de Polignac number, because 340204431 - 2⁷ = 340204303 is a prime.

It is a super-2 number, since 2×340204431² = 231478109744067522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 340204398 and 340204407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340204411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 351696 + ... + 352661.

It is an arithmetic number, because the mean of its divisors is an integer number (33809184).

Almost surely, 2^340204431 is an apocalyptic number.

340204431 is a deficient number, since it is larger than the sum of its proper divisors (200742513).

340204431 is a wasteful number, since it uses less digits than its factorization.

340204431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704390.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 340204431 is about 18444.6314953701. The cubic root of 340204431 is about 698.0930622244.

Adding to 340204431 its reverse (134402043), we get a palindrome (474606474).

The spelling of 340204431 in words is "three hundred forty million, two hundred four thousand, four hundred thirty-one".