646276632 has 64 divisors (see below), whose sum is σ = 1731559680. Its totient is φ = 200483712.

The previous prime is 646276613. The next prime is 646276633. The reversal of 646276632 is 236672646.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646276633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4603 + ... + 36245.

It is an arithmetic number, because the mean of its divisors is an integer number (27055620).

Almost surely, 2^646276632 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 646276632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (865779840).

646276632 is an abundant number, since it is smaller than the sum of its proper divisors (1085283048).

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

646276632 is a wasteful number, since it uses less digits than its factorization.

646276632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31712 (or 31708 counting only the distinct ones).

The product of its digits is 435456, while the sum is 42.

The square root of 646276632 is about 25421.9714420420. The cubic root of 646276632 is about 864.5819232173.

The spelling of 646276632 in words is "six hundred forty-six million, two hundred seventy-six thousand, six hundred thirty-two".