647536 has 10 divisors (see below), whose sum is σ = 1254632. Its totient is φ = 323760.

The previous prime is 647531. The next prime is 647551. The reversal of 647536 is 635746.

It is a junction number, because it is equal to n+sod(n) for n = 647498 and 647507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20220 + ... + 20251.

2⁶⁴⁷⁵³⁶ is an apocalyptic number.

It is an amenable number.

647536 is a deficient number, since it is larger than the sum of its proper divisors (607096).

647536 is a wasteful number, since it uses less digits than its factorization.

647536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40479 (or 40473 counting only the distinct ones).

The product of its digits is 15120, while the sum is 31.

The square root of 647536 is about 804.6962159722. The cubic root of 647536 is about 86.5143148483.

The spelling of 647536 in words is "six hundred forty-seven thousand, five hundred thirty-six".