638354 has 8 divisors (see below), whose sum is σ = 978048. Its totient is φ = 312340.

The previous prime is 638347. The next prime is 638359. The reversal of 638354 is 453836.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (638359) 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, 3302 + ... + 3489.

It is an arithmetic number, because the mean of its divisors is an integer number (122256).

2⁶³⁸³⁵⁴ is an apocalyptic number.

638354 is a deficient number, since it is larger than the sum of its proper divisors (339694).

638354 is a wasteful number, since it uses less digits than its factorization.

638354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6840.

The product of its digits is 8640, while the sum is 29.

The square root of 638354 is about 798.9705876939. The cubic root of 638354 is about 86.1034450184.

The spelling of 638354 in words is "six hundred thirty-eight thousand, three hundred fifty-four".