287622 has 36 divisors (see below), whose sum is σ = 679380. Its totient is φ = 87696.

The previous prime is 287611. The next prime is 287629. The reversal of 287622 is 226782.

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 287622.

It is not an unprimeable number, because it can be changed into a prime (287629) by changing a digit.

287622 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 9904 + ... + 9932.

287622 is a Friedman number, since it can be written as 87^2*(6^2+2), using all its digits and the basic arithmetic operations.

2²⁸⁷⁶²² is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 287622, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (339690).

287622 is an abundant number, since it is smaller than the sum of its proper divisors (391758).

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

287622 is a wasteful number, since it uses less digits than its factorization.

287622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85 (or 53 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 287622 is about 536.3040182583. The cubic root of 287622 is about 66.0096404650.

It can be divided in two parts, 287 and 622, that added together give a palindrome (909).

The spelling of 287622 in words is "two hundred eighty-seven thousand, six hundred twenty-two".