802644 has 24 divisors (see below), whose sum is σ = 1887648. Its totient is φ = 265440.

The previous prime is 802643. The next prime is 802649. The reversal of 802644 is 446208.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 802644.

It is not an unprimeable number, because it can be changed into a prime (802643) 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 7 ways as a sum of consecutive naturals, for example, 2374 + ... + 2690.

It is an arithmetic number, because the mean of its divisors is an integer number (78652).

2⁸⁰²⁶⁴⁴ is an apocalyptic number.

It is an amenable number.

802644 is an abundant number, since it is smaller than the sum of its proper divisors (1085004).

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

802644 is a wasteful number, since it uses less digits than its factorization.

802644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535 (or 533 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 802644 is about 895.9040127156. The cubic root of 802644 is about 92.9339338855.

Subtracting from 802644 its product of nonzero digits (1536), we obtain a palindrome (801108).

The spelling of 802644 in words is "eight hundred two thousand, six hundred forty-four".