638302 has 16 divisors (see below), whose sum is σ = 1105920. Its totient is φ = 270648.

The previous prime is 638269. The next prime is 638303. The reversal of 638302 is 203836.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638303) by changing a digit.

638302 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 (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1599 + ... + 1957.

It is an arithmetic number, because the mean of its divisors is an integer number (69120).

2⁶³⁸³⁰² is an apocalyptic number.

638302 is a deficient number, since it is larger than the sum of its proper divisors (467618).

638302 is a wasteful number, since it uses less digits than its factorization.

638302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 638302 is about 798.9380451574. The cubic root of 638302 is about 86.1011069736.

The spelling of 638302 in words is "six hundred thirty-eight thousand, three hundred two".