397984320 has 224 divisors, whose sum is σ = 1425488640. Its totient is φ = 104509440.

The previous prime is 397984303. The next prime is 397984357. The reversal of 397984320 is 23489793.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 630405 + ... + 631035.

Almost surely, 2^397984320 is an apocalyptic number.

397984320 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 397984320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (712744320).

397984320 is an abundant number, since it is smaller than the sum of its proper divisors (1027504320).

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

397984320 is a wasteful number, since it uses less digits than its factorization.

397984320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730 (or 714 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 397984320 is about 19949.5443556990. The cubic root of 397984320 is about 735.5665768846.

The spelling of 397984320 in words is "three hundred ninety-seven million, nine hundred eighty-four thousand, three hundred twenty".