646963450 has 24 divisors (see below), whose sum is σ = 1375260192. Its totient is φ = 221815920.

The previous prime is 646963439. The next prime is 646963453. The reversal of 646963450 is 54369646.

It is a junction number, because it is equal to n+sod(n) for n = 646963397 and 646963406.

It is not an unprimeable number, because it can be changed into a prime (646963453) 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, 923884 + ... + 924583.

It is an arithmetic number, because the mean of its divisors is an integer number (57302508).

Almost surely, 2^646963450 is an apocalyptic number.

646963450 is an abundant number, since it is smaller than the sum of its proper divisors (728296742).

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

646963450 is a wasteful number, since it uses less digits than its factorization.

646963450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1848486 (or 1848481 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 43.

The square root of 646963450 is about 25435.4762094206. The cubic root of 646963450 is about 864.8880873625. Note that the first 3 decimals are identical.

The spelling of 646963450 in words is "six hundred forty-six million, nine hundred sixty-three thousand, four hundred fifty".