638883 has 12 divisors (see below), whose sum is σ = 1054768. Its totient is φ = 365040.

The previous prime is 638861. The next prime is 638893. The reversal of 638883 is 388836.

It is not a de Polignac number, because 638883 - 2⁶ = 638819 is a prime.

It is a Duffinian number.

638883 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (638893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5008 + ... + 5133.

2⁶³⁸⁸⁸³ is an apocalyptic number.

638883 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

638883 is a deficient number, since it is larger than the sum of its proper divisors (415885).

638883 is a wasteful number, since it uses less digits than its factorization.

638883 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10154 (or 10151 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 638883 is about 799.3015701223. The cubic root of 638883 is about 86.1272229150.

Subtracting from 638883 its reverse (388836), we obtain a cube (250047 = 63³).

It can be divided in two parts, 638 and 883, that added together give a square (1521 = 39²).

The spelling of 638883 in words is "six hundred thirty-eight thousand, eight hundred eighty-three".