647632 has 20 divisors (see below), whose sum is σ = 1329156. Its totient is φ = 304640.

The previous prime is 647627. The next prime is 647641. The reversal of 647632 is 236746.

It can be written as a sum of positive squares in 2 ways, for example, as 179776 + 467856 = 424^2 + 684^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 647632.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 919 + ... + 1462.

2⁶⁴⁷⁶³² is an apocalyptic number.

It is an amenable number.

647632 is an abundant number, since it is smaller than the sum of its proper divisors (681524).

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

647632 is a wasteful number, since it uses less digits than its factorization.

647632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2406 (or 2400 counting only the distinct ones).

The product of its digits is 6048, while the sum is 28.

The square root of 647632 is about 804.7558636009. The cubic root of 647632 is about 86.5185900103.

The spelling of 647632 in words is "six hundred forty-seven thousand, six hundred thirty-two".