396644394680 has 64 divisors (see below), whose sum is σ = 942867216000. Its totient is φ = 149927486464.

The previous prime is 396644394677. The next prime is 396644394703. The reversal of 396644394680 is 86493446693.

It is a super-3 number, since 3×396644394680³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3583085 + ... + 3692124.

It is an arithmetic number, because the mean of its divisors is an integer number (14732300250).

Almost surely, 2^396644394680 is an apocalyptic number.

It is an amenable number.

396644394680 is an abundant number, since it is smaller than the sum of its proper divisors (546222821320).

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

396644394680 is a wasteful number, since it uses less digits than its factorization.

396644394680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7275296 (or 7275292 counting only the distinct ones).

The product of its (nonzero) digits is 80621568, while the sum is 62.

It can be divided in two parts, 39664 and 4394680, that added together give a palindrome (4434344).

The spelling of 396644394680 in words is "three hundred ninety-six billion, six hundred forty-four million, three hundred ninety-four thousand, six hundred eighty".