638374 has 8 divisors (see below), whose sum is σ = 1044648. Its totient is φ = 290160.

The previous prime is 638371. The next prime is 638423. The reversal of 638374 is 473836.

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

It is a congruent number.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14487 + ... + 14530.

It is an arithmetic number, because the mean of its divisors is an integer number (130581).

2⁶³⁸³⁷⁴ is an apocalyptic number.

638374 is a deficient number, since it is larger than the sum of its proper divisors (406274).

638374 is a wasteful number, since it uses less digits than its factorization.

638374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29030.

The product of its digits is 12096, while the sum is 31.

The square root of 638374 is about 798.9831037012. The cubic root of 638374 is about 86.1043442326.

The spelling of 638374 in words is "six hundred thirty-eight thousand, three hundred seventy-four".