3638611428 has 24 divisors (see below), whose sum is σ = 8539173888. Its totient is φ = 1205858976.

The previous prime is 3638611421. The next prime is 3638611429. The reversal of 3638611428 is 8241168363.

3638611428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 3638611428.

It is not an unprimeable number, because it can be changed into a prime (3638611421) 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, 874276 + ... + 878427.

It is an arithmetic number, because the mean of its divisors is an integer number (355798912).

Almost surely, 2^3638611428 is an apocalyptic number.

It is an amenable number.

3638611428 is an abundant number, since it is smaller than the sum of its proper divisors (4900562460).

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

3638611428 is a wasteful number, since it uses less digits than its factorization.

3638611428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1752883 (or 1752881 counting only the distinct ones).

The product of its digits is 165888, while the sum is 42.

The square root of 3638611428 is about 60320.9037399142. The cubic root of 3638611428 is about 1538.0787064947.

The spelling of 3638611428 in words is "three billion, six hundred thirty-eight million, six hundred eleven thousand, four hundred twenty-eight".