397941320 has 128 divisors (see below), whose sum is σ = 1087257600. Its totient is φ = 128044800.

The previous prime is 397941311. The next prime is 397941329. The reversal of 397941320 is 23149793.

It is an interprime number because it is at equal distance from previous prime (397941311) and next prime (397941329).

It is a Harshad number since it is a multiple of its sum of digits (38).

It is not an unprimeable number, because it can be changed into a prime (397941329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 696635 + ... + 697205.

It is an arithmetic number, because the mean of its divisors is an integer number (8494200).

Almost surely, 2^397941320 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 397941320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (543628800).

397941320 is an abundant number, since it is smaller than the sum of its proper divisors (689316280).

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

397941320 is a wasteful number, since it uses less digits than its factorization.

397941320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739 (or 735 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 397941320 is about 19948.4666077370. The cubic root of 397941320 is about 735.5400846332.

It can be divided in two parts, 39794 and 1320, that added together give a palindrome (41114).

The spelling of 397941320 in words is "three hundred ninety-seven million, nine hundred forty-one thousand, three hundred twenty".