647080 has 32 divisors (see below), whose sum is σ = 1664640. Its totient is φ = 221760.

The previous prime is 647069. The next prime is 647081. The reversal of 647080 is 80746.

It is a Smith number, since the sum of its digits (25) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (647081) by changing a digit.

647080 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, 876 + ... + 1435.

It is an arithmetic number, because the mean of its divisors is an integer number (52020).

2⁶⁴⁷⁰⁸⁰ is an apocalyptic number.

It is an amenable number.

647080 is an abundant number, since it is smaller than the sum of its proper divisors (1017560).

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

647080 is a wasteful number, since it uses less digits than its factorization.

647080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2329 (or 2325 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 647080 is about 804.4128293358. The cubic root of 647080 is about 86.4940020566.

The spelling of 647080 in words is "six hundred forty-seven thousand, eighty".