3638606402 has 12 divisors (see below), whose sum is σ = 5519947506. Its totient is φ = 1798853760.

The previous prime is 3638606401. The next prime is 3638606443. The reversal of 3638606402 is 2046068363.

It can be written as a sum of positive squares in 3 ways, for example, as 2558235241 + 1080371161 = 50579^2 + 32869^2 .

It is not an unprimeable number, because it can be changed into a prime (3638606401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 98999 + ... + 130682.

Almost surely, 2^3638606402 is an apocalyptic number.

3638606402 is a deficient number, since it is larger than the sum of its proper divisors (1881341104).

3638606402 is an equidigital number, since it uses as much as digits as its factorization.

3638606402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229861 (or 229772 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 38.

The square root of 3638606402 is about 60320.8620793834. The cubic root of 3638606402 is about 1538.0779983137.

The spelling of 3638606402 in words is "three billion, six hundred thirty-eight million, six hundred six thousand, four hundred two".