397704384 has 448 divisors, whose sum is σ = 1511808000. Its totient is φ = 101606400.

The previous prime is 397704361. The next prime is 397704389. The reversal of 397704384 is 483407793.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (448).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397704389) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6519714 + ... + 6519774.

Almost surely, 2^397704384 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 397704384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (755904000).

397704384 is an abundant number, since it is smaller than the sum of its proper divisors (1114103616).

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

397704384 is a wasteful number, since it uses less digits than its factorization.

397704384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114 (or 84 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 45.

The square root of 397704384 is about 19942.5270214183. The cubic root of 397704384 is about 735.3940743913.

The spelling of 397704384 in words is "three hundred ninety-seven million, seven hundred four thousand, three hundred eighty-four".