340100405 has 8 divisors (see below), whose sum is σ = 409815384. Its totient is φ = 270950400.

The previous prime is 340100377. The next prime is 340100407. The reversal of 340100405 is 504001043.

It can be written as a sum of positive squares in 4 ways, for example, as 6599761 + 333500644 = 2569^2 + 18262^2 .

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

It is not a de Polignac number, because 340100405 - 2²⁸ = 71664949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340100407) 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, 139916 + ... + 142325.

It is an arithmetic number, because the mean of its divisors is an integer number (51226923).

Almost surely, 2^340100405 is an apocalyptic number.

It is an amenable number.

340100405 is a deficient number, since it is larger than the sum of its proper divisors (69714979).

340100405 is a wasteful number, since it uses less digits than its factorization.

340100405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282487.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 340100405 is about 18441.8113264397. The cubic root of 340100405 is about 698.0219018423.

Adding to 340100405 its reverse (504001043), we get a palindrome (844101448).

The spelling of 340100405 in words is "three hundred forty million, one hundred thousand, four hundred five".