397855800 has 240 divisors, whose sum is σ = 1417878000. Its totient is φ = 103334400.

The previous prime is 397855793. The next prime is 397855807. The reversal of 397855800 is 8558793.

397855800 is a `hidden beast` number, since 3 + 97 + 8 + 558 + 0 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (397855793) and next prime (397855807).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397855807) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 663901 + ... + 664499.

It is an arithmetic number, because the mean of its divisors is an integer number (5907825).

Almost surely, 2^397855800 is an apocalyptic number.

397855800 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 397855800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (708939000).

397855800 is an abundant number, since it is smaller than the sum of its proper divisors (1020022200).

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

397855800 is a wasteful number, since it uses less digits than its factorization.

397855800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668 (or 650 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The square root of 397855800 is about 19946.3229694097. The cubic root of 397855800 is about 735.4873901851.

The spelling of 397855800 in words is "three hundred ninety-seven million, eight hundred fifty-five thousand, eight hundred".