3638140460 has 48 divisors (see below), whose sum is σ = 8000729856. Its totient is φ = 1387015872.

The previous prime is 3638140459. The next prime is 3638140507. The reversal of 3638140460 is 640418363.

It is a self number, because there is not a number n which added to its sum of digits gives 3638140460.

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 15 ways as a sum of consecutive naturals, for example, 116207 + ... + 144153.

It is an arithmetic number, because the mean of its divisors is an integer number (166681872).

Almost surely, 2^3638140460 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3638140460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4000364928).

3638140460 is an abundant number, since it is smaller than the sum of its proper divisors (4362589396).

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

3638140460 is a wasteful number, since it uses less digits than its factorization.

3638140460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28262 (or 28260 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 3638140460 is about 60316.9997596034. Note that the first 3 decimals coincide. The cubic root of 3638140460 is about 1538.0123426155.

The spelling of 3638140460 in words is "three billion, six hundred thirty-eight million, one hundred forty thousand, four hundred sixty".