647396462 has 24 divisors (see below), whose sum is σ = 1028864592. Its totient is φ = 305474400.

The previous prime is 647396461. The next prime is 647396473. The reversal of 647396462 is 264693746.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647396461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 201287 + ... + 204477.

It is an arithmetic number, because the mean of its divisors is an integer number (42869358).

Almost surely, 2^647396462 is an apocalyptic number.

647396462 is a deficient number, since it is larger than the sum of its proper divisors (381468130).

647396462 is a wasteful number, since it uses less digits than its factorization.

647396462 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3512 (or 3493 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 47.

The square root of 647396462 is about 25443.9867552237. The cubic root of 647396462 is about 865.0810005784.

The spelling of 647396462 in words is "six hundred forty-seven million, three hundred ninety-six thousand, four hundred sixty-two".