873640 has 16 divisors (see below), whose sum is σ = 1965780. Its totient is φ = 349440.

The previous prime is 873619. The next prime is 873641. The reversal of 873640 is 46378.

It can be written as a sum of positive squares in 2 ways, for example, as 702244 + 171396 = 838^2 + 414^2 .

It is a d-powerful number, because it can be written as 8⁵ + 7⁷ + 6³ + 3⁶ + 4⁷ + 0 .

It is a junction number, because it is equal to n+sod(n) for n = 873599 and 873608.

It is not an unprimeable number, because it can be changed into a prime (873641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10881 + ... + 10960.

2⁸⁷³⁶⁴⁰ is an apocalyptic number.

It is an amenable number.

873640 is an abundant number, since it is smaller than the sum of its proper divisors (1092140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

873640 is a wasteful number, since it uses less digits than its factorization.

873640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21852 (or 21848 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 873640 is about 934.6871134235. The cubic root of 873640 is about 95.5969794159.

The spelling of 873640 in words is "eight hundred seventy-three thousand, six hundred forty".