397171320 has 256 divisors, whose sum is σ = 1507645440. Its totient is φ = 81451008.

The previous prime is 397171309. The next prime is 397171343. The reversal of 397171320 is 23171793.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 403549 + ... + 404531.

It is an arithmetic number, because the mean of its divisors is an integer number (5889240).

Almost surely, 2^397171320 is an apocalyptic number.

397171320 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 397171320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (753822720).

397171320 is an abundant number, since it is smaller than the sum of its proper divisors (1110474120).

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

397171320 is a wasteful number, since it uses less digits than its factorization.

397171320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1054 (or 1050 counting only the distinct ones).

The product of its (nonzero) digits is 7938, while the sum is 33.

The square root of 397171320 is about 19929.1575336239. The cubic root of 397171320 is about 735.0653650970.

The spelling of 397171320 in words is "three hundred ninety-seven million, one hundred seventy-one thousand, three hundred twenty".