397886080 has 32 divisors (see below), whose sum is σ = 951197940. Its totient is φ = 159154176.

The previous prime is 397885997. The next prime is 397886081. The reversal of 397886080 is 80688793.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 321987136 + 75898944 = 17944^2 + 8712^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (397886081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 310209 + ... + 311488.

Almost surely, 2^397886080 is an apocalyptic number.

It is an amenable number.

397886080 is an abundant number, since it is smaller than the sum of its proper divisors (553311860).

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

397886080 is an equidigital number, since it uses as much as digits as its factorization.

397886080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621716 (or 621704 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 49.

The square root of 397886080 is about 19947.0819921110. The cubic root of 397886080 is about 735.5060485308.

The spelling of 397886080 in words is "three hundred ninety-seven million, eight hundred eighty-six thousand, eighty".