647859396 has 24 divisors (see below), whose sum is σ = 1520414784. Its totient is φ = 214704160.

The previous prime is 647859383. The next prime is 647859403. The reversal of 647859396 is 693958746.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153960 + ... + 158111.

It is an arithmetic number, because the mean of its divisors is an integer number (63350616).

Almost surely, 2^647859396 is an apocalyptic number.

It is an amenable number.

647859396 is an abundant number, since it is smaller than the sum of its proper divisors (872555388).

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

647859396 is a wasteful number, since it uses less digits than its factorization.

647859396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312251 (or 312249 counting only the distinct ones).

The product of its digits is 9797760, while the sum is 57.

The square root of 647859396 is about 25453.0822495037. The cubic root of 647859396 is about 865.2871493674.

The spelling of 647859396 in words is "six hundred forty-seven million, eight hundred fifty-nine thousand, three hundred ninety-six".