872638 has 8 divisors (see below), whose sum is σ = 1409688. Its totient is φ = 402744.

The previous prime is 872623. The next prime is 872647. The reversal of 872638 is 836278.

It is a happy number.

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

It is a super-2 number, since 2×872638² = 1522994158088, which contains 22 as substring.

It is a congruent 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, 16756 + ... + 16807.

It is an arithmetic number, because the mean of its divisors is an integer number (176211).

2⁸⁷²⁶³⁸ is an apocalyptic number.

872638 is a deficient number, since it is larger than the sum of its proper divisors (537050).

872638 is a wasteful number, since it uses less digits than its factorization.

872638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33578.

The product of its digits is 16128, while the sum is 34.

The square root of 872638 is about 934.1509513992. The cubic root of 872638 is about 95.5604178965.

The spelling of 872638 in words is "eight hundred seventy-two thousand, six hundred thirty-eight".