647936 has 18 divisors (see below), whose sum is σ = 1293852. Its totient is φ = 323840.

The previous prime is 647917. The next prime is 647951. The reversal of 647936 is 639746.

It is a junction number, because it is equal to n+sod(n) for n = 647896 and 647905.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010 + ... + 1521.

2⁶⁴⁷⁹³⁶ is an apocalyptic number.

It is an amenable number.

647936 is a deficient number, since it is larger than the sum of its proper divisors (645916).

647936 is an equidigital number, since it uses as much as digits as its factorization.

647936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2547 (or 2533 counting only the distinct ones).

The product of its digits is 27216, while the sum is 35.

The square root of 647936 is about 804.9447185987. The cubic root of 647936 is about 86.5321252366.

It can be divided in two parts, 64 and 7936, that added together give a cube (8000 = 20³).

The spelling of 647936 in words is "six hundred forty-seven thousand, nine hundred thirty-six".