638498 has 16 divisors (see below), whose sum is σ = 1114560. Its totient is φ = 268656.

The previous prime is 638489. The next prime is 638501. The reversal of 638498 is 894836.

638498 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 638498.

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, 440 + ... + 1212.

It is an arithmetic number, because the mean of its divisors is an integer number (69660).

2⁶³⁸⁴⁹⁸ is an apocalyptic number.

638498 is a deficient number, since it is larger than the sum of its proper divisors (476062).

638498 is a wasteful number, since it uses less digits than its factorization.

638498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841.

The product of its digits is 41472, while the sum is 38.

The square root of 638498 is about 799.0606985705. The cubic root of 638498 is about 86.1099189414.

The spelling of 638498 in words is "six hundred thirty-eight thousand, four hundred ninety-eight".