646963248 has 20 divisors (see below), whose sum is σ = 1671321848. Its totient is φ = 215654400.

The previous prime is 646963193. The next prime is 646963253. The reversal of 646963248 is 842369646.

It is a super-2 number, since 2×646963248² = 837122888525419008, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 13478401 = 646963248 / (6 + 4 + 6 + 9 + 6 + 3 + 2 + 4 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 646963197 and 646963206.

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, 6739153 + ... + 6739248.

Almost surely, 2^646963248 is an apocalyptic number.

It is an amenable number.

646963248 is an abundant number, since it is smaller than the sum of its proper divisors (1024358600).

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

646963248 is a wasteful number, since it uses less digits than its factorization.

646963248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13478412 (or 13478406 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 48.

The square root of 646963248 is about 25435.4722385884. The cubic root of 646963248 is about 864.8879973485.

The spelling of 646963248 in words is "six hundred forty-six million, nine hundred sixty-three thousand, two hundred forty-eight".