647484 has 24 divisors (see below), whose sum is σ = 1532160. Its totient is φ = 212784.

The previous prime is 647477. The next prime is 647489. The reversal of 647484 is 484746.

647484 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

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 647484.

It is not an unprimeable number, because it can be changed into a prime (647489) by changing a digit.

647484 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 7 ways as a sum of consecutive naturals, for example, 607 + ... + 1289.

It is an arithmetic number, because the mean of its divisors is an integer number (63840).

2⁶⁴⁷⁴⁸⁴ is an apocalyptic number.

It is an amenable number.

647484 is an abundant number, since it is smaller than the sum of its proper divisors (884676).

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

647484 is a wasteful number, since it uses less digits than its factorization.

647484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769 (or 767 counting only the distinct ones).

The product of its digits is 21504, while the sum is 33.

The square root of 647484 is about 804.6639049939. The cubic root of 647484 is about 86.5119989592.

The spelling of 647484 in words is "six hundred forty-seven thousand, four hundred eighty-four".