638146 has 12 divisors (see below), whose sum is σ = 1020978. Its totient is φ = 298112.

The previous prime is 638123. The next prime is 638147. The reversal of 638146 is 641836.

638146 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 622521 + 15625 = 789^2 + 125^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638147) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4590 + ... + 4726.

2⁶³⁸¹⁴⁶ is an apocalyptic number.

638146 is a deficient number, since it is larger than the sum of its proper divisors (382832).

638146 is a wasteful number, since it uses less digits than its factorization.

638146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293 (or 156 counting only the distinct ones).

The product of its digits is 3456, while the sum is 28.

The square root of 638146 is about 798.8404095938. The cubic root of 638146 is about 86.0940920773.

It can be divided in two parts, 638 and 146, that added together give a square (784 = 28²).

The spelling of 638146 in words is "six hundred thirty-eight thousand, one hundred forty-six".