638376 has 32 divisors (see below), whose sum is σ = 1623840. Its totient is φ = 209088.

The previous prime is 638371. The next prime is 638423. The reversal of 638376 is 673836.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (638371) by changing a digit.

638376 is an untouchable number, because it is not equal to the sum of proper divisors of any 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, 1410 + ... + 1806.

It is an arithmetic number, because the mean of its divisors is an integer number (50745).

2⁶³⁸³⁷⁶ is an apocalyptic number.

It is an amenable number.

638376 is an abundant number, since it is smaller than the sum of its proper divisors (985464).

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

638376 is a wasteful number, since it uses less digits than its factorization.

638376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473 (or 469 counting only the distinct ones).

The product of its digits is 18144, while the sum is 33.

The square root of 638376 is about 798.9843552911. The cubic root of 638376 is about 86.1044341530.

The spelling of 638376 in words is "six hundred thirty-eight thousand, three hundred seventy-six".