647311436 has 12 divisors (see below), whose sum is σ = 1171857120. Its totient is φ = 312495120.

The previous prime is 647311429. The next prime is 647311453. The reversal of 647311436 is 634113746.

It is a junction number, because it is equal to n+sod(n) for n = 647311396 and 647311405.

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, 2790020 + ... + 2790251.

It is an arithmetic number, because the mean of its divisors is an integer number (97654760).

Almost surely, 2^647311436 is an apocalyptic number.

It is an amenable number.

647311436 is a deficient number, since it is larger than the sum of its proper divisors (524545684).

647311436 is a wasteful number, since it uses less digits than its factorization.

647311436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5580304 (or 5580302 counting only the distinct ones).

The product of its digits is 36288, while the sum is 35.

The square root of 647311436 is about 25442.3158537111. The cubic root of 647311436 is about 865.0431270333.

The spelling of 647311436 in words is "six hundred forty-seven million, three hundred eleven thousand, four hundred thirty-six".