646953248 has 12 divisors (see below), whose sum is σ = 1273689270. Its totient is φ = 323476608.

The previous prime is 646953247. The next prime is 646953289. The reversal of 646953248 is 842359646.

It can be written as a sum of positive squares in only one way, i.e., 632421904 + 14531344 = 25148^2 + 3812^2 .

It is not an unprimeable number, because it can be changed into a prime (646953247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10108613 + ... + 10108676.

Almost surely, 2^646953248 is an apocalyptic number.

It is an amenable number.

646953248 is a deficient number, since it is larger than the sum of its proper divisors (626736022).

646953248 is a wasteful number, since it uses less digits than its factorization.

646953248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20217299 (or 20217291 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 47.

The square root of 646953248 is about 25435.2756619621. The cubic root of 646953248 is about 864.8835411837.

The spelling of 646953248 in words is "six hundred forty-six million, nine hundred fifty-three thousand, two hundred forty-eight".