397970560 has 128 divisors (see below), whose sum is σ = 1058319360. Its totient is φ = 142110720.

The previous prime is 397970537. The next prime is 397970579. The reversal of 397970560 is 65079793.

397970560 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (128).

It is a self number, because there is not a number n which added to its sum of digits gives 397970560.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 257149 + ... + 258691.

It is an arithmetic number, because the mean of its divisors is an integer number (8268120).

Almost surely, 2^397970560 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 397970560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (529159680).

397970560 is an abundant number, since it is smaller than the sum of its proper divisors (660348800).

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

397970560 is a wasteful number, since it uses less digits than its factorization.

397970560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1606 (or 1594 counting only the distinct ones).

The product of its (nonzero) digits is 357210, while the sum is 46.

The square root of 397970560 is about 19949.1994826860. The cubic root of 397970560 is about 735.5580995718.

The spelling of 397970560 in words is "three hundred ninety-seven million, nine hundred seventy thousand, five hundred sixty".