397778360 has 64 divisors (see below), whose sum is σ = 1055877120. Its totient is φ = 131978880.

The previous prime is 397778347. The next prime is 397778369. The reversal of 397778360 is 63877793.

It is a junction number, because it is equal to n+sod(n) for n = 397778299 and 397778308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397778369) 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, 14234 + ... + 31593.

It is an arithmetic number, because the mean of its divisors is an integer number (16498080).

Almost surely, 2^397778360 is an apocalyptic number.

It is an amenable number.

397778360 is an abundant number, since it is smaller than the sum of its proper divisors (658098760).

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

397778360 is a wasteful number, since it uses less digits than its factorization.

397778360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45876 (or 45872 counting only the distinct ones).

The product of its (nonzero) digits is 1333584, while the sum is 50.

The square root of 397778360 is about 19944.3816650204. The cubic root of 397778360 is about 735.4396678367.

The spelling of 397778360 in words is "three hundred ninety-seven million, seven hundred seventy-eight thousand, three hundred sixty".