638025 has 24 divisors (see below), whose sum is σ = 1083264. Its totient is φ = 331200.

The previous prime is 638023. The next prime is 638047. The reversal of 638025 is 520836.

638025 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 638025 - 2¹ = 638023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 637986 and 638004.

It is not an unprimeable number, because it can be changed into a prime (638023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3435 + ... + 3615.

It is an arithmetic number, because the mean of its divisors is an integer number (45136).

2⁶³⁸⁰²⁵ is an apocalyptic number.

It is an amenable number.

638025 is a deficient number, since it is larger than the sum of its proper divisors (445239).

638025 is a wasteful number, since it uses less digits than its factorization.

638025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241 (or 236 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 638025 is about 798.7646712268. The cubic root of 638025 is about 86.0886502486.

It can be divided in two parts, 6 and 38025, that multiplied together give a triangular number (228150 = T₆₇₅).

The spelling of 638025 in words is "six hundred thirty-eight thousand, twenty-five".