397317984 has 96 divisors (see below), whose sum is σ = 1195117056. Its totient is φ = 113218560.

The previous prime is 397317961. The next prime is 397317989. The reversal of 397317984 is 489713793.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397317989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 423564 + ... + 424500.

It is an arithmetic number, because the mean of its divisors is an integer number (12449136).

Almost surely, 2^397317984 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 397317984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (597558528).

397317984 is an abundant number, since it is smaller than the sum of its proper divisors (797799072).

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

397317984 is a wasteful number, since it uses less digits than its factorization.

397317984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1588 (or 1580 counting only the distinct ones).

The product of its digits is 1143072, while the sum is 51.

The square root of 397317984 is about 19932.8368277072. The cubic root of 397317984 is about 735.1558334952.

The spelling of 397317984 in words is "three hundred ninety-seven million, three hundred seventeen thousand, nine hundred eighty-four".