396721330308 has 192 divisors, whose sum is σ = 1069661716480. Its totient is φ = 127020960000.

The previous prime is 396721330273. The next prime is 396721330309. The reversal of 396721330308 is 803033127693.

396721330308 is a `hidden beast` number, since 3 + 9 + 6 + 7 + 2 + 1 + 330 + 308 = 666.

It is not an unprimeable number, because it can be changed into a prime (396721330309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 300318288 + ... + 300319608.

Almost surely, 2^396721330308 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 396721330308, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (534830858240).

396721330308 is an abundant number, since it is smaller than the sum of its proper divisors (672940386172).

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

396721330308 is a wasteful number, since it uses less digits than its factorization.

396721330308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1967 (or 1959 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 45.

The spelling of 396721330308 in words is "three hundred ninety-six billion, seven hundred twenty-one million, three hundred thirty thousand, three hundred eight".