3638881869 has 8 divisors (see below), whose sum is σ = 5544962880. Its totient is φ = 2079361056.

The previous prime is 3638881859. The next prime is 3638881877. The reversal of 3638881869 is 9681888363.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3638881869 - 2⁸ = 3638881613 is a prime.

It is a super-2 number, since 2×3638881869² = 26482922513073866322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3638881849) 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, 86640024 + ... + 86640065.

It is an arithmetic number, because the mean of its divisors is an integer number (693120360).

Almost surely, 2^3638881869 is an apocalyptic number.

It is an amenable number.

3638881869 is a deficient number, since it is larger than the sum of its proper divisors (1906081011).

3638881869 is a wasteful number, since it uses less digits than its factorization.

3638881869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173280099.

The product of its digits is 11943936, while the sum is 60.

The square root of 3638881869 is about 60323.1453838409. The cubic root of 3638881869 is about 1538.1168116205.

The spelling of 3638881869 in words is "three billion, six hundred thirty-eight million, eight hundred eighty-one thousand, eight hundred sixty-nine".