397980080 has 80 divisors (see below), whose sum is σ = 983508480. Its totient is φ = 149342976.

The previous prime is 397980059. The next prime is 397980083. The reversal of 397980080 is 80089793.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (397980083) 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, 161417 + ... + 163863.

It is an arithmetic number, because the mean of its divisors is an integer number (12293856).

Almost surely, 2^397980080 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 397980080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (491754240).

397980080 is an abundant number, since it is smaller than the sum of its proper divisors (585528400).

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

397980080 is a wasteful number, since it uses less digits than its factorization.

397980080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2586 (or 2580 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 397980080 is about 19949.4380873247. The cubic root of 397980080 is about 735.5639647102.

The spelling of 397980080 in words is "three hundred ninety-seven million, nine hundred eighty thousand, eighty".