647568 has 40 divisors (see below), whose sum is σ = 1860000. Its totient is φ = 215712.

The previous prime is 647557. The next prime is 647579. The reversal of 647568 is 865746.

It is a happy number.

647568 is a `hidden beast` number, since 647 + 5 + 6 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (647557) and next prime (647579).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 647568.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 318 + ... + 1181.

It is an arithmetic number, because the mean of its divisors is an integer number (46500).

2⁶⁴⁷⁵⁶⁸ is an apocalyptic number.

It is an amenable number.

647568 is an abundant number, since it is smaller than the sum of its proper divisors (1212432).

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

647568 is a wasteful number, since it uses less digits than its factorization.

647568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1516 (or 1504 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 647568 is about 804.7160990064. The cubic root of 647568 is about 86.5157399493.

It can be divided in two parts, 6 and 47568, that added together give a palindrome (47574).

The spelling of 647568 in words is "six hundred forty-seven thousand, five hundred sixty-eight".