638027641 has 8 divisors (see below), whose sum is σ = 641944800. Its totient is φ = 634122720.

The previous prime is 638027623. The next prime is 638027671. The reversal of 638027641 is 146720836.

638027641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 638027641 - 2⁹ = 638027129 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 638027641.

It is not an unprimeable number, because it can be changed into a prime (638027671) 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, 115030 + ... + 120448.

It is an arithmetic number, because the mean of its divisors is an integer number (80243100).

Almost surely, 2^638027641 is an apocalyptic number.

It is an amenable number.

638027641 is a deficient number, since it is larger than the sum of its proper divisors (3917159).

638027641 is a wasteful number, since it uses less digits than its factorization.

638027641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6119.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 638027641 is about 25259.2090335386. The cubic root of 638027641 is about 860.8876903172.

The spelling of 638027641 in words is "six hundred thirty-eight million, twenty-seven thousand, six hundred forty-one".