397813800 has 96 divisors (see below), whose sum is σ = 1238402880. Its totient is φ = 105638400.

The previous prime is 397813799. The next prime is 397813807. The reversal of 397813800 is 8318793.

It is not an unprimeable number, because it can be changed into a prime (397813807) 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 23 ways as a sum of consecutive naturals, for example, 156540 + ... + 159060.

It is an arithmetic number, because the mean of its divisors is an integer number (12900030).

Almost surely, 2^397813800 is an apocalyptic number.

397813800 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 397813800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (619201440).

397813800 is an abundant number, since it is smaller than the sum of its proper divisors (840589080).

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

397813800 is a wasteful number, since it uses less digits than its factorization.

397813800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2803 (or 2794 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 397813800 is about 19945.2701159949. The cubic root of 397813800 is about 735.4615084817.

The spelling of 397813800 in words is "three hundred ninety-seven million, eight hundred thirteen thousand, eight hundred".