396566280 has 192 divisors, whose sum is σ = 1458475200. Its totient is φ = 96111360.

The previous prime is 396566273. The next prime is 396566297. The reversal of 396566280 is 82665693.

It is a happy number.

396566280 is a `hidden beast` number, since 3 + 9 + 6 + 566 + 2 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 105066 + ... + 108774.

It is an arithmetic number, because the mean of its divisors is an integer number (7596225).

Almost surely, 2^396566280 is an apocalyptic number.

396566280 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 396566280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (729237600).

396566280 is an abundant number, since it is smaller than the sum of its proper divisors (1061908920).

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

396566280 is a wasteful number, since it uses less digits than its factorization.

396566280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3746 (or 3730 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The square root of 396566280 is about 19913.9719794922. The cubic root of 396566280 is about 734.6919158621.

The spelling of 396566280 in words is "three hundred ninety-six million, five hundred sixty-six thousand, two hundred eighty".