397840368 has 20 divisors (see below), whose sum is σ = 1027754408. Its totient is φ = 132613440.

The previous prime is 397840367. The next prime is 397840393. The reversal of 397840368 is 863048793.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 8288341 = 397840368 / (3 + 9 + 7 + 8 + 4 + 0 + 3 + 6 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397840367) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4144123 + ... + 4144218.

Almost surely, 2^397840368 is an apocalyptic number.

It is an amenable number.

397840368 is an abundant number, since it is smaller than the sum of its proper divisors (629914040).

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

397840368 is a wasteful number, since it uses less digits than its factorization.

397840368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8288352 (or 8288346 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 48.

The square root of 397840368 is about 19945.9361274421. The cubic root of 397840368 is about 735.4778807195.

The spelling of 397840368 in words is "three hundred ninety-seven million, eight hundred forty thousand, three hundred sixty-eight".