638004535 has 8 divisors (see below), whose sum is σ = 874977696. Its totient is φ = 437488800.

The previous prime is 638004517. The next prime is 638004569. The reversal of 638004535 is 535400836.

638004535 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 638004535 - 2¹⁷ = 637873463 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 638004535.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9114316 + ... + 9114385.

It is an arithmetic number, because the mean of its divisors is an integer number (109372212).

Almost surely, 2^638004535 is an apocalyptic number.

638004535 is a deficient number, since it is larger than the sum of its proper divisors (236973161).

638004535 is a wasteful number, since it uses less digits than its factorization.

638004535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18228713.

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 638004535 is about 25258.7516516553. The cubic root of 638004535 is about 860.8772979194.

The spelling of 638004535 in words is "six hundred thirty-eight million, four thousand, five hundred thirty-five".