638276 has 6 divisors (see below), whose sum is σ = 1116990. Its totient is φ = 319136.

The previous prime is 638269. The next prime is 638303. The reversal of 638276 is 672836.

638276 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 602176 + 36100 = 776^2 + 190^2 .

It is an unprimeable number.

638276 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79781 + ... + 79788.

It is an arithmetic number, because the mean of its divisors is an integer number (186165).

2⁶³⁸²⁷⁶ is an apocalyptic number.

It is an amenable number.

638276 is a deficient number, since it is larger than the sum of its proper divisors (478714).

638276 is a wasteful number, since it uses less digits than its factorization.

638276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159573 (or 159571 counting only the distinct ones).

The product of its digits is 12096, while the sum is 32.

The square root of 638276 is about 798.9217733921. The cubic root of 638276 is about 86.0999379036.

The spelling of 638276 in words is "six hundred thirty-eight thousand, two hundred seventy-six".