647488 has 28 divisors (see below), whose sum is σ = 1312672. Its totient is φ = 316800.

The previous prime is 647477. The next prime is 647489. The reversal of 647488 is 884746.

It is a congruent number.

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

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4213 + ... + 4363.

2⁶⁴⁷⁴⁸⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 647488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (656336).

647488 is an abundant number, since it is smaller than the sum of its proper divisors (665184).

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

647488 is a wasteful number, since it uses less digits than its factorization.

647488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230 (or 220 counting only the distinct ones).

The product of its digits is 43008, while the sum is 37.

The square root of 647488 is about 804.6663904998. Note that the first 3 decimals coincide. The cubic root of 647488 is about 86.5121771089.

The spelling of 647488 in words is "six hundred forty-seven thousand, four hundred eighty-eight".