638035 has 4 divisors (see below), whose sum is σ = 765648. Its totient is φ = 510424.

The previous prime is 638023. The next prime is 638047. The reversal of 638035 is 530836.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (638023) and next prime (638047).

It is a cyclic number.

It is not a de Polignac number, because 638035 - 2¹³ = 629843 is a prime.

It is a super-2 number, since 2×638035² = 814177322450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 63799 + ... + 63808.

It is an arithmetic number, because the mean of its divisors is an integer number (191412).

2⁶³⁸⁰³⁵ is an apocalyptic number.

638035 is a deficient number, since it is larger than the sum of its proper divisors (127613).

638035 is a wasteful number, since it uses less digits than its factorization.

638035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127612.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 638035 is about 798.7709308682. The cubic root of 638035 is about 86.0891000126.

The spelling of 638035 in words is "six hundred thirty-eight thousand, thirty-five".