647380 has 12 divisors (see below), whose sum is σ = 1359540. Its totient is φ = 258944.

The previous prime is 647371. The next prime is 647399. The reversal of 647380 is 83746.

It can be written as a sum of positive squares in 2 ways, for example, as 111556 + 535824 = 334^2 + 732^2 .

It is a congruent number.

It is an unprimeable number.

647380 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 3 ways as a sum of consecutive naturals, for example, 16165 + ... + 16204.

It is an arithmetic number, because the mean of its divisors is an integer number (113295).

2⁶⁴⁷³⁸⁰ is an apocalyptic number.

It is an amenable number.

647380 is an abundant number, since it is smaller than the sum of its proper divisors (712160).

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

647380 is a wasteful number, since it uses less digits than its factorization.

647380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32378 (or 32376 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 647380 is about 804.5992791446. The cubic root of 647380 is about 86.5073668089.

The spelling of 647380 in words is "six hundred forty-seven thousand, three hundred eighty".