396331056 has 140 divisors (see below), whose sum is σ = 1256381640. Its totient is φ = 120061440.

The previous prime is 396331037. The next prime is 396331057. The reversal of 396331056 is 650133693.

396331056 is a `hidden beast` number, since 3 + 9 + 633 + 10 + 5 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 396331056.

It is not an unprimeable number, because it can be changed into a prime (396331057) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 126760 + ... + 129848.

Almost surely, 2^396331056 is an apocalyptic number.

396331056 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 396331056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (628190820).

396331056 is an abundant number, since it is smaller than the sum of its proper divisors (860050584).

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

396331056 is a wasteful number, since it uses less digits than its factorization.

396331056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3126 (or 3105 counting only the distinct ones).

The product of its (nonzero) digits is 43740, while the sum is 36.

The square root of 396331056 is about 19908.0650993511. The cubic root of 396331056 is about 734.5466258563.

The spelling of 396331056 in words is "three hundred ninety-six million, three hundred thirty-one thousand, fifty-six".