340442431 has 8 divisors (see below), whose sum is σ = 390346880. Its totient is φ = 290855448.

The previous prime is 340442429. The next prime is 340442447. The reversal of 340442431 is 134244043.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 340442431 - 2¹ = 340442429 is a prime.

It is a super-2 number, since 2×340442431² = 231802097650379522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 340442396 and 340442405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340443431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77061 + ... + 81358.

It is an arithmetic number, because the mean of its divisors is an integer number (48793360).

Almost surely, 2^340442431 is an apocalyptic number.

340442431 is a deficient number, since it is larger than the sum of its proper divisors (49904449).

340442431 is a wasteful number, since it uses less digits than its factorization.

340442431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158733.

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 340442431 is about 18451.0821091881. The cubic root of 340442431 is about 698.2558147781.

Adding to 340442431 its reverse (134244043), we get a palindrome (474686474).

The spelling of 340442431 in words is "three hundred forty million, four hundred forty-two thousand, four hundred thirty-one".