156840345 has 24 divisors (see below), whose sum is σ = 286166400. Its totient is φ = 79245216.

The previous prime is 156840329. The next prime is 156840353. The reversal of 156840345 is 543048651.

It is a happy number.

It is not a de Polignac number, because 156840345 - 2⁴ = 156840329 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 90865 + ... + 92574.

It is an arithmetic number, because the mean of its divisors is an integer number (11923600).

Almost surely, 2^156840345 is an apocalyptic number.

156840345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

156840345 is a deficient number, since it is larger than the sum of its proper divisors (129326055).

156840345 is a wasteful number, since it uses less digits than its factorization.

156840345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183469 (or 183466 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 156840345 is about 12523.5915375742. The cubic root of 156840345 is about 539.2861452105.

Adding to 156840345 its reverse (543048651), we get a palindrome (699888996).

The spelling of 156840345 in words is "one hundred fifty-six million, eight hundred forty thousand, three hundred forty-five".