646714368 has 264 divisors, whose sum is σ = 2038615488. Its totient is φ = 204374016.

The previous prime is 646714283. The next prime is 646714417. The reversal of 646714368 is 863417646.

It is a happy number.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5723080 + ... + 5723192.

Almost surely, 2^646714368 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 646714368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1019307744).

646714368 is an abundant number, since it is smaller than the sum of its proper divisors (1391901120).

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

646714368 is a wasteful number, since it uses less digits than its factorization.

646714368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171 (or 141 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The square root of 646714368 is about 25430.5793878158. The cubic root of 646714368 is about 864.7770786663. Note that the first 3 decimals are identical.

The spelling of 646714368 in words is "six hundred forty-six million, seven hundred fourteen thousand, three hundred sixty-eight".