638029 has 12 divisors (see below), whose sum is σ = 769500. Its totient is φ = 526848.

The previous prime is 638023. The next prime is 638047. The reversal of 638029 is 920836.

It can be written as a sum of positive squares in 2 ways, for example, as 362404 + 275625 = 602^2 + 525^2 .

It is not a de Polignac number, because 638029 - 2¹¹ = 635981 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 637988 and 638006.

It is a congruent number.

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

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1197 + ... + 1645.

It is an arithmetic number, because the mean of its divisors is an integer number (64125).

2⁶³⁸⁰²⁹ is an apocalyptic number.

It is an amenable number.

638029 is a deficient number, since it is larger than the sum of its proper divisors (131471).

638029 is a wasteful number, since it uses less digits than its factorization.

638029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492 (or 485 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 638029 is about 798.7671750892. The cubic root of 638029 is about 86.0888301547.

The spelling of 638029 in words is "six hundred thirty-eight thousand, twenty-nine".