396660 has 48 divisors (see below), whose sum is σ = 1213632. Its totient is φ = 96000.

The previous prime is 396647. The next prime is 396667. The reversal of 396660 is 66693.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (396667) by changing a digit.

396660 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 360 + ... + 960.

It is an arithmetic number, because the mean of its divisors is an integer number (25284).

2³⁹⁶⁶⁶⁰ is an apocalyptic number.

396660 is a gapful number since it is divisible by the number (30) 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 396660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (606816).

396660 is an abundant number, since it is smaller than the sum of its proper divisors (816972).

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

396660 is a wasteful number, since it uses less digits than its factorization.

396660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624 (or 622 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 30.

The square root of 396660 is about 629.8094950062. The cubic root of 396660 is about 73.4749787569.

The spelling of 396660 in words is "three hundred ninety-six thousand, six hundred sixty".