396680856 has 192 divisors, whose sum is σ = 1242760320. Its totient is φ = 104232960.

The previous prime is 396680831. The next prime is 396680881. The reversal of 396680856 is 658086693.

It is an interprime number because it is at equal distance from previous prime (396680831) and next prime (396680881).

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a junction number, because it is equal to n+sod(n) for n = 396680799 and 396680808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 758211 + ... + 758733.

It is an arithmetic number, because the mean of its divisors is an integer number (6472710).

Almost surely, 2^396680856 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 396680856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (621380160).

396680856 is an abundant number, since it is smaller than the sum of its proper divisors (846079464).

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

396680856 is a wasteful number, since it uses less digits than its factorization.

396680856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 586 (or 569 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 51.

The square root of 396680856 is about 19916.8485458920. The cubic root of 396680856 is about 734.7626648219.

The spelling of 396680856 in words is "three hundred ninety-six million, six hundred eighty thousand, eight hundred fifty-six".