396509440236 has 192 divisors, whose sum is σ = 1152487375872. Its totient is φ = 103311065088.

The previous prime is 396509440219. The next prime is 396509440247. The reversal of 396509440236 is 632044905693.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 65352075 + ... + 65358141.

It is an arithmetic number, because the mean of its divisors is an integer number (6002538416).

Almost surely, 2^396509440236 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 396509440236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (576243687936).

396509440236 is an abundant number, since it is smaller than the sum of its proper divisors (755977935636).

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

396509440236 is a wasteful number, since it uses less digits than its factorization.

396509440236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6808 (or 6806 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 51.

The spelling of 396509440236 in words is "three hundred ninety-six billion, five hundred nine million, four hundred forty thousand, two hundred thirty-six".