646834468 has 24 divisors (see below), whose sum is σ = 1335401984. Its totient is φ = 268272000.

The previous prime is 646834459. The next prime is 646834477. The reversal of 646834468 is 864438646.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (646834459) and next prime (646834477).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 371733 + ... + 373468.

Almost surely, 2^646834468 is an apocalyptic number.

It is an amenable number.

646834468 is an abundant number, since it is smaller than the sum of its proper divisors (688567516).

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

646834468 is a wasteful number, since it uses less digits than its factorization.

646834468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745243 (or 745241 counting only the distinct ones).

The product of its digits is 2654208, while the sum is 49.

The square root of 646834468 is about 25432.9406085887. The cubic root of 646834468 is about 864.8306073459.

The spelling of 646834468 in words is "six hundred forty-six million, eight hundred thirty-four thousand, four hundred sixty-eight".