646946472 has 32 divisors (see below), whose sum is σ = 1618267680. Its totient is φ = 215528640.

The previous prime is 646946459. The next prime is 646946473. The reversal of 646946472 is 274649646.

It is not an unprimeable number, because it can be changed into a prime (646946473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43522 + ... + 56462.

It is an arithmetic number, because the mean of its divisors is an integer number (50570865).

Almost surely, 2^646946472 is an apocalyptic number.

It is an amenable number.

646946472 is an abundant number, since it is smaller than the sum of its proper divisors (971321208).

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

646946472 is a wasteful number, since it uses less digits than its factorization.

646946472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15033 (or 15029 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 48.

The square root of 646946472 is about 25435.1424607766. The cubic root of 646946472 is about 864.8805216603.

The spelling of 646946472 in words is "six hundred forty-six million, nine hundred forty-six thousand, four hundred seventy-two".