638152 has 8 divisors (see below), whose sum is σ = 1196550. Its totient is φ = 319072.

The previous prime is 638147. The next prime is 638159. The reversal of 638152 is 251836.

It is a happy number.

638152 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 only one way, i.e., 401956 + 236196 = 634^2 + 486^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (638159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39877 + ... + 39892.

2⁶³⁸¹⁵² is an apocalyptic number.

It is an amenable number.

638152 is a deficient number, since it is larger than the sum of its proper divisors (558398).

638152 is a wasteful number, since it uses less digits than its factorization.

638152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79775 (or 79771 counting only the distinct ones).

The product of its digits is 1440, while the sum is 25.

The square root of 638152 is about 798.8441650284. The cubic root of 638152 is about 86.0943619021.

Adding to 638152 its reverse (251836), we get a palindrome (889988).

The spelling of 638152 in words is "six hundred thirty-eight thousand, one hundred fifty-two".