638086 has 8 divisors (see below), whose sum is σ = 966240. Its totient is φ = 316008.

The previous prime is 638081. The next prime is 638117. The reversal of 638086 is 680836.

638086 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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (638081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1246 + ... + 1681.

It is an arithmetic number, because the mean of its divisors is an integer number (120780).

2⁶³⁸⁰⁸⁶ is an apocalyptic number.

638086 is a deficient number, since it is larger than the sum of its proper divisors (328154).

638086 is a wasteful number, since it uses less digits than its factorization.

638086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3038.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 638086 is about 798.8028542763. The cubic root of 638086 is about 86.0913937358.

The spelling of 638086 in words is "six hundred thirty-eight thousand, eighty-six".