638106 has 16 divisors (see below), whose sum is σ = 1458624. Its totient is φ = 182304.

The previous prime is 638081. The next prime is 638117. The reversal of 638106 is 601836.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7555 + ... + 7638.

It is an arithmetic number, because the mean of its divisors is an integer number (91164).

2⁶³⁸¹⁰⁶ is an apocalyptic number.

638106 is an abundant number, since it is smaller than the sum of its proper divisors (820518).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

638106 is a wasteful number, since it uses less digits than its factorization.

638106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15205.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 638106 is about 798.8153729117. The cubic root of 638106 is about 86.0922932018.

The spelling of 638106 in words is "six hundred thirty-eight thousand, one hundred six".