340440023 has 8 divisors (see below), whose sum is σ = 424444800. Its totient is φ = 265277880.

The previous prime is 340440017. The next prime is 340440083. The reversal of 340440023 is 320044043.

It is a happy number.

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

It is not a de Polignac number, because 340440023 - 2²² = 336245719 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 340439977 and 340440004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340440083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2210573 + ... + 2210726.

It is an arithmetic number, because the mean of its divisors is an integer number (53055600).

Almost surely, 2^340440023 is an apocalyptic number.

340440023 is a deficient number, since it is larger than the sum of its proper divisors (84004777).

340440023 is a wasteful number, since it uses less digits than its factorization.

340440023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4421317.

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 340440023 is about 18451.0168554473. The cubic root of 340440023 is about 698.2541684851.

Adding to 340440023 its reverse (320044043), we get a palindrome (660484066).

The spelling of 340440023 in words is "three hundred forty million, four hundred forty thousand, twenty-three".