647622 has 32 divisors (see below), whose sum is σ = 1468800. Its totient is φ = 211464.

The previous prime is 647617. The next prime is 647627. The reversal of 647622 is 226746.

647622 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (647617) and next prime (647627).

It is a Harshad number since it is a multiple of its sum of digits (27).

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 647622.

It is not an unprimeable number, because it can be changed into a prime (647627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3529 + ... + 3707.

It is an arithmetic number, because the mean of its divisors is an integer number (45900).

2⁶⁴⁷⁶²² is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 647622, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (734400).

647622 is an abundant number, since it is smaller than the sum of its proper divisors (821178).

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

647622 is a wasteful number, since it uses less digits than its factorization.

647622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257 (or 251 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 647622 is about 804.7496505125. The cubic root of 647622 is about 86.5181447006.

The spelling of 647622 in words is "six hundred forty-seven thousand, six hundred twenty-two".