340444431 has 16 divisors (see below), whose sum is σ = 534031200. Its totient is φ = 213611904.

The previous prime is 340444421. The next prime is 340444463. The reversal of 340444431 is 134444043.

It is not a de Polignac number, because 340444431 - 2⁵ = 340444399 is a prime.

It is a super-2 number, since 2×340444431² = 231804821197827522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 340444395 and 340444404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340444421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 370396 + ... + 371313.

It is an arithmetic number, because the mean of its divisors is an integer number (33376950).

Almost surely, 2^340444431 is an apocalyptic number.

340444431 is a deficient number, since it is larger than the sum of its proper divisors (193586769).

340444431 is a wasteful number, since it uses less digits than its factorization.

340444431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741735 (or 741729 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

The square root of 340444431 is about 18451.1363064718. The cubic root of 340444431 is about 698.2571821251.

Adding to 340444431 its reverse (134444043), we get a palindrome (474888474).

The spelling of 340444431 in words is "three hundred forty million, four hundred forty-four thousand, four hundred thirty-one".