507638 has 4 divisors (see below), whose sum is σ = 761460. Its totient is φ = 253818.

The previous prime is 507631. The next prime is 507641. The reversal of 507638 is 836705.

507638 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 836705 = 5 ⋅167341.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 507638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (507631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126908 + ... + 126911.

It is an arithmetic number, because the mean of its divisors is an integer number (190365).

2⁵⁰⁷⁶³⁸ is an apocalyptic number.

507638 is a deficient number, since it is larger than the sum of its proper divisors (253822).

507638 is a wasteful number, since it uses less digits than its factorization.

507638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253821.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 507638 is about 712.4871928674. The cubic root of 507638 is about 79.7721642519.

The spelling of 507638 in words is "five hundred seven thousand, six hundred thirty-eight".