3638140489 has 3 divisors (see below), whose sum is σ = 3638200807. Its totient is φ = 3638080172.

The previous prime is 3638140459. The next prime is 3638140507. The reversal of 3638140489 is 9840418363.

The square root of 3638140489 is 60317.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 27092025 + 3611048464 = 5205^2 + 60092^2 .

It is not a de Polignac number, because 3638140489 - 2⁷ = 3638140361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3638140409) by changing a digit.

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 2 ways as a sum of consecutive naturals, for example, 30159 + ... + 90475.

Almost surely, 2^3638140489 is an apocalyptic number.

3638140489 is the 60317-th square number.

3638140489 is the 30159-th centered octagonal number.

It is an amenable number.

3638140489 is a deficient number, since it is larger than the sum of its proper divisors (60318).

3638140489 is an frugal number, since it uses more digits than its factorization.

3638140489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120634 (or 60317 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 46.

The cubic root of 3638140489 is about 1538.0123467020.

The spelling of 3638140489 in words is "three billion, six hundred thirty-eight million, one hundred forty thousand, four hundred eighty-nine".