397885380 has 48 divisors (see below), whose sum is σ = 1132971840. Its totient is φ = 104303488.

The previous prime is 397885379. The next prime is 397885381. The reversal of 397885380 is 83588793.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (397885379) and next prime (397885381).

It is not an unprimeable number, because it can be changed into a prime (397885381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52659 + ... + 59738.

It is an arithmetic number, because the mean of its divisors is an integer number (23603580).

Almost surely, 2^397885380 is an apocalyptic number.

397885380 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

397885380 is an abundant number, since it is smaller than the sum of its proper divisors (735086460).

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

397885380 is a wasteful number, since it uses less digits than its factorization.

397885380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112468 (or 112466 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 51.

The square root of 397885380 is about 19947.0644456772. The cubic root of 397885380 is about 735.5056172059.

The spelling of 397885380 in words is "three hundred ninety-seven million, eight hundred eighty-five thousand, three hundred eighty".