638274 has 48 divisors (see below), whose sum is σ = 1608768. Its totient is φ = 167328.

The previous prime is 638269. The next prime is 638303. The reversal of 638274 is 472836.

638274 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

Its product of digits (8064) is a multiple of the sum of its prime divisors (192).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 638274.

It is an unprimeable number.

638274 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is an upside-down number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3739 + ... + 3905.

It is an arithmetic number, because the mean of its divisors is an integer number (33516).

2⁶³⁸²⁷⁴ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 638274, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (804384).

638274 is an abundant number, since it is smaller than the sum of its proper divisors (970494).

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

638274 is a wasteful number, since it uses less digits than its factorization.

638274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199 (or 192 counting only the distinct ones).

The product of its digits is 8064, while the sum is 30.

The square root of 638274 is about 798.9205217041. The cubic root of 638274 is about 86.0998479738.

The spelling of 638274 in words is "six hundred thirty-eight thousand, two hundred seventy-four".