396994366944 has 360 divisors, whose sum is σ = 1359706582080. Its totient is φ = 113298683904.

The previous prime is 396994366939. The next prime is 396994366961. The reversal of 396994366944 is 449663499693.

396994366944 is a `hidden beast` number, since 3 + 9 + 6 + 99 + 436 + 69 + 44 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 223406184 + ... + 223407960.

It is an arithmetic number, because the mean of its divisors is an integer number (3776962728).

Almost surely, 2^396994366944 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 396994366944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (679853291040).

396994366944 is an abundant number, since it is smaller than the sum of its proper divisors (962712215136).

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

396994366944 is a wasteful number, since it uses less digits than its factorization.

396994366944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3572 (or 3548 counting only the distinct ones).

The product of its digits is 816293376, while the sum is 72.

The spelling of 396994366944 in words is "three hundred ninety-six billion, nine hundred ninety-four million, three hundred sixty-six thousand, nine hundred forty-four".