396662745920 has 504 divisors, whose sum is σ = 1145002764600. Its totient is φ = 130486272000.

The previous prime is 396662745887. The next prime is 396662745937. The reversal of 396662745920 is 29547266693.

It can be written as a sum of positive squares in 12 ways, for example, as 263472783616 + 133189962304 = 513296^2 + 364952^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 396662745920.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2662166006 + ... + 2662166154.

Almost surely, 2^396662745920 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 396662745920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (572501382300).

396662745920 is an abundant number, since it is smaller than the sum of its proper divisors (748340018680).

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

396662745920 is a wasteful number, since it uses less digits than its factorization.

396662745920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363 (or 305 counting only the distinct ones).

The product of its (nonzero) digits is 29393280, while the sum is 59.

The spelling of 396662745920 in words is "three hundred ninety-six billion, six hundred sixty-two million, seven hundred forty-five thousand, nine hundred twenty".