396136818 has 120 divisors (see below), whose sum is σ = 1115438016. Its totient is φ = 102857040.

The previous prime is 396136801. The next prime is 396136823. The reversal of 396136818 is 818631693.

It is a happy 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, 135771 + ... + 138657.

Almost surely, 2^396136818 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 396136818, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (557719008).

396136818 is an abundant number, since it is smaller than the sum of its proper divisors (719301198).

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

396136818 is a wasteful number, since it uses less digits than its factorization.

396136818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2930 (or 2910 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 396136818 is about 19903.1861268491. The cubic root of 396136818 is about 734.4266081927.

The spelling of 396136818 in words is "three hundred ninety-six million, one hundred thirty-six thousand, eight hundred eighteen".