646934448 has 40 divisors (see below), whose sum is σ = 1675178496. Its totient is φ = 215137600.

The previous prime is 646934447. The next prime is 646934467. The reversal of 646934448 is 844439646.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 646934397 and 646934406.

It is not an unprimeable number, because it can be changed into a prime (646934447) 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 7 ways as a sum of consecutive naturals, for example, 5053 + ... + 36323.

Almost surely, 2^646934448 is an apocalyptic number.

It is an amenable number.

646934448 is an abundant number, since it is smaller than the sum of its proper divisors (1028244048).

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

646934448 is a wasteful number, since it uses less digits than its factorization.

646934448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31713 (or 31707 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 48.

The square root of 646934448 is about 25434.9060937917. The cubic root of 646934448 is about 864.8751634696.

The spelling of 646934448 in words is "six hundred forty-six million, nine hundred thirty-four thousand, four hundred forty-eight".