638334 has 16 divisors (see below), whose sum is σ = 1418640. Its totient is φ = 212760.

The previous prime is 638327. The next prime is 638347. The reversal of 638334 is 433836.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 638298 and 638307.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5857 + ... + 5964.

It is an arithmetic number, because the mean of its divisors is an integer number (88665).

2⁶³⁸³³⁴ is an apocalyptic number.

638334 is an abundant number, since it is smaller than the sum of its proper divisors (780306).

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

638334 is a wasteful number, since it uses less digits than its factorization.

638334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11832 (or 11826 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

The square root of 638334 is about 798.9580714906. The cubic root of 638334 is about 86.1025457854.

The spelling of 638334 in words is "six hundred thirty-eight thousand, three hundred thirty-four".