397791420 has 48 divisors (see below), whose sum is σ = 1199496480. Its totient is φ = 97917696.

The previous prime is 397791413. The next prime is 397791421. The reversal of 397791420 is 24197793.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397791421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 254215 + ... + 255774.

It is an arithmetic number, because the mean of its divisors is an integer number (24989510).

Almost surely, 2^397791420 is an apocalyptic number.

397791420 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

397791420 is an abundant number, since it is smaller than the sum of its proper divisors (801705060).

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

397791420 is a wasteful number, since it uses less digits than its factorization.

397791420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510014 (or 510012 counting only the distinct ones).

The product of its (nonzero) digits is 95256, while the sum is 42.

The square root of 397791420 is about 19944.7090728343. The cubic root of 397791420 is about 735.4477164872.

The spelling of 397791420 in words is "three hundred ninety-seven million, seven hundred ninety-one thousand, four hundred twenty".