636540342 has 16 divisors (see below), whose sum is σ = 1275985920. Its totient is φ = 211695912.

The previous prime is 636540319. The next prime is 636540403. The reversal of 636540342 is 243045636.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118198 + ... + 123465.

It is an arithmetic number, because the mean of its divisors is an integer number (79749120).

Almost surely, 2^636540342 is an apocalyptic number.

636540342 is an abundant number, since it is smaller than the sum of its proper divisors (639445578).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

636540342 is a wasteful number, since it uses less digits than its factorization.

636540342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242107.

The product of its (nonzero) digits is 51840, while the sum is 33.

The square root of 636540342 is about 25229.7511283802. The cubic root of 636540342 is about 860.2182346825.

Adding to 636540342 its reverse (243045636), we get a palindrome (879585978).

The spelling of 636540342 in words is "six hundred thirty-six million, five hundred forty thousand, three hundred forty-two".