647647436 has 12 divisors (see below), whose sum is σ = 1200052728. Its totient is φ = 304775232.

The previous prime is 647647397. The next prime is 647647457. The reversal of 647647436 is 634746746.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4762046 + ... + 4762181.

It is an arithmetic number, because the mean of its divisors is an integer number (100004394).

Almost surely, 2^647647436 is an apocalyptic number.

It is an amenable number.

647647436 is a deficient number, since it is larger than the sum of its proper divisors (552405292).

647647436 is a wasteful number, since it uses less digits than its factorization.

647647436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9524248 (or 9524246 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 47.

The square root of 647647436 is about 25448.9181695411. The cubic root of 647647436 is about 865.1927738127.

The spelling of 647647436 in words is "six hundred forty-seven million, six hundred forty-seven thousand, four hundred thirty-six".