3638140490 has 16 divisors (see below), whose sum is σ = 6596455752. Its totient is φ = 1444633344.

The previous prime is 3638140459. The next prime is 3638140507. The reversal of 3638140490 is 940418363.

It is a Cunningham number, because it is equal to 60317²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 3627532441 + 10608049 = 60229^2 + 3257^2 .

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, 1326419 + ... + 1329158.

Almost surely, 2^3638140490 is an apocalyptic number.

3638140490 is a deficient number, since it is larger than the sum of its proper divisors (2958315262).

3638140490 is a wasteful number, since it uses less digits than its factorization.

3638140490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2655721.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 3638140490 is about 60317.0000082895. Note that the first 5 decimals coincide. The cubic root of 3638140490 is about 1538.0123468429.

The spelling of 3638140490 in words is "three billion, six hundred thirty-eight million, one hundred forty thousand, four hundred ninety".