397636200 has 144 divisors (see below), whose sum is σ = 1438202220. Its totient is φ = 97873920.

The previous prime is 397636193. The next prime is 397636201. The reversal of 397636200 is 2636793.

397636200 is a `hidden beast` number, since 397 + 63 + 6 + 200 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 23677956 + 373958244 = 4866^2 + 19338^2 .

It is a super-2 number, since 2×397636200² = 316229095100880000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (397636201) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 14904 + ... + 31896.

Almost surely, 2^397636200 is an apocalyptic number.

397636200 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 397636200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (719101110).

397636200 is an abundant number, since it is smaller than the sum of its proper divisors (1040566020).

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

397636200 is a wasteful number, since it uses less digits than its factorization.

397636200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17028 (or 17016 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 36.

The square root of 397636200 is about 19940.8174356018. The cubic root of 397636200 is about 735.3520457076.

The spelling of 397636200 in words is "three hundred ninety-seven million, six hundred thirty-six thousand, two hundred".