340740423 has 18 divisors (see below), whose sum is σ = 513980376. Its totient is φ = 217114392.

The previous prime is 340740403. The next prime is 340740427. The reversal of 340740423 is 324047043.

It is not a de Polignac number, because 340740423 - 2⁵ = 340740391 is a prime.

It is a super-2 number, since 2×340740423² = 232208071732437858, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340740427) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 264940 + ... + 266222.

Almost surely, 2^340740423 is an apocalyptic number.

340740423 is a deficient number, since it is larger than the sum of its proper divisors (173239953).

340740423 is an equidigital number, since it uses as much as digits as its factorization.

340740423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2595 (or 1309 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 27.

The square root of 340740423 is about 18459.1555332307. The cubic root of 340740423 is about 698.4594850098.

Adding to 340740423 its reverse (324047043), we get a palindrome (664787466).

The spelling of 340740423 in words is "three hundred forty million, seven hundred forty thousand, four hundred twenty-three".