636240634 has 8 divisors (see below), whose sum is σ = 954903348. Its totient is φ = 317939520.

The previous prime is 636240629. The next prime is 636240637. The reversal of 636240634 is 436042636.

It can be written as a sum of positive squares in 2 ways, for example, as 624850009 + 11390625 = 24997^2 + 3375^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 636240634.

It is not an unprimeable number, because it can be changed into a prime (636240637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85957 + ... + 93064.

Almost surely, 2^636240634 is an apocalyptic number.

636240634 is a deficient number, since it is larger than the sum of its proper divisors (318662714).

636240634 is a wasteful number, since it uses less digits than its factorization.

636240634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180800.

The product of its (nonzero) digits is 62208, while the sum is 34.

The square root of 636240634 is about 25223.8108540323. The cubic root of 636240634 is about 860.0832053983.

The spelling of 636240634 in words is "six hundred thirty-six million, two hundred forty thousand, six hundred thirty-four".