397280 has 48 divisors (see below), whose sum is σ = 1016064. Its totient is φ = 145920.

The previous prime is 397259. The next prime is 397283. The reversal of 397280 is 82793.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397283) by changing a digit.

397280 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 7 ways as a sum of consecutive naturals, for example, 1985 + ... + 2175.

It is an arithmetic number, because the mean of its divisors is an integer number (21168).

2³⁹⁷²⁸⁰ 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 397280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (508032).

397280 is an abundant number, since it is smaller than the sum of its proper divisors (618784).

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

397280 is a wasteful number, since it uses less digits than its factorization.

397280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219 (or 211 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 397280 is about 630.3015151497. The cubic root of 397280 is about 73.5132405536.

The spelling of 397280 in words is "three hundred ninety-seven thousand, two hundred eighty".