647608 has 24 divisors (see below), whose sum is σ = 1317600. Its totient is φ = 298272.

The previous prime is 647593. The next prime is 647609. The reversal of 647608 is 806746.

647608 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×647608² = 838792243328, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 647608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647609) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1113 + ... + 1591.

It is an arithmetic number, because the mean of its divisors is an integer number (54900).

2⁶⁴⁷⁶⁰⁸ 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 647608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (658800).

647608 is an abundant number, since it is smaller than the sum of its proper divisors (669992).

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

647608 is a wasteful number, since it uses less digits than its factorization.

647608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511 (or 494 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 647608 is about 804.7409521082. The cubic root of 647608 is about 86.5175212594.

The spelling of 647608 in words is "six hundred forty-seven thousand, six hundred eight".