340140423 has 16 divisors (see below), whose sum is σ = 521418240. Its totient is φ = 193200096.

The previous prime is 340140421. The next prime is 340140431. The reversal of 340140423 is 324041043.

It is not a de Polignac number, because 340140423 - 2¹ = 340140421 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 340140423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340140421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44988 + ... + 52001.

It is an arithmetic number, because the mean of its divisors is an integer number (32588640).

Almost surely, 2^340140423 is an apocalyptic number.

340140423 is a deficient number, since it is larger than the sum of its proper divisors (181277817).

340140423 is a wasteful number, since it uses less digits than its factorization.

340140423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97166.

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

The square root of 340140423 is about 18442.8962747178. The cubic root of 340140423 is about 698.0492784097.

Adding to 340140423 its reverse (324041043), we get a palindrome (664181466).

The spelling of 340140423 in words is "three hundred forty million, one hundred forty thousand, four hundred twenty-three".