397388880 has 240 divisors, whose sum is σ = 1567173504. Its totient is φ = 88335360.

The previous prime is 397388879. The next prime is 397388983. The reversal of 397388880 is 88883793.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (240).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 185415 + ... + 187545.

Almost surely, 2^397388880 is an apocalyptic number.

397388880 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 397388880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (783586752).

397388880 is an abundant number, since it is smaller than the sum of its proper divisors (1169784624).

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

397388880 is a wasteful number, since it uses less digits than its factorization.

397388880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2194 (or 2185 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 54.

The square root of 397388880 is about 19934.6151204381. The cubic root of 397388880 is about 735.1995570872.

The spelling of 397388880 in words is "three hundred ninety-seven million, three hundred eighty-eight thousand, eight hundred eighty".