801638 has 8 divisors (see below), whose sum is σ = 1207632. Its totient is φ = 399096.

The previous prime is 801631. The next prime is 801641. The reversal of 801638 is 836108.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (801631) 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 3 ways as a sum of consecutive naturals, for example, 170 + ... + 1277.

It is an arithmetic number, because the mean of its divisors is an integer number (150954).

2⁸⁰¹⁶³⁸ is an apocalyptic number.

801638 is a deficient number, since it is larger than the sum of its proper divisors (405994).

801638 is a wasteful number, since it uses less digits than its factorization.

801638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1726.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 801638 is about 895.3423926074. The cubic root of 801638 is about 92.8950911673.

The spelling of 801638 in words is "eight hundred one thousand, six hundred thirty-eight".