638264 has 16 divisors (see below), whose sum is σ = 1305720. Its totient is φ = 290080.

The previous prime is 638263. The next prime is 638269. The reversal of 638264 is 462836.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638263) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 3539 + ... + 3714.

2⁶³⁸²⁶⁴ is an apocalyptic number.

It is an amenable number.

638264 is an abundant number, since it is smaller than the sum of its proper divisors (667456).

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

638264 is a wasteful number, since it uses less digits than its factorization.

638264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7270 (or 7266 counting only the distinct ones).

The product of its digits is 6912, while the sum is 29.

The square root of 638264 is about 798.9142632348. The cubic root of 638264 is about 86.0993983221.

It can be divided in two parts, 6382 and 64, that added together give a palindrome (6446).

The spelling of 638264 in words is "six hundred thirty-eight thousand, two hundred sixty-four".