397906080 has 576 divisors, whose sum is σ = 1621638144. Its totient is φ = 81100800.

The previous prime is 397906079. The next prime is 397906087. The reversal of 397906080 is 80609793.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397906087) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 12835665 + ... + 12835695.

It is an arithmetic number, because the mean of its divisors is an integer number (2815344).

Almost surely, 2^397906080 is an apocalyptic number.

397906080 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 397906080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (810819072).

397906080 is an abundant number, since it is smaller than the sum of its proper divisors (1223732064).

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

397906080 is a wasteful number, since it uses less digits than its factorization.

397906080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101 (or 82 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 397906080 is about 19947.5833122712. The cubic root of 397906080 is about 735.5183718861.

The spelling of 397906080 in words is "three hundred ninety-seven million, nine hundred six thousand, eighty".