397693800 has 432 divisors, whose sum is σ = 1620833760. Its totient is φ = 90357120.

The previous prime is 397693783. The next prime is 397693811. The reversal of 397693800 is 8396793.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 2381317 + ... + 2381483.

It is an arithmetic number, because the mean of its divisors is an integer number (3751930).

Almost surely, 2^397693800 is an apocalyptic number.

397693800 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 397693800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (810416880).

397693800 is an abundant number, since it is smaller than the sum of its proper divisors (1223139960).

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

397693800 is a wasteful number, since it uses less digits than its factorization.

397693800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212 (or 184 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 397693800 is about 19942.2616570940. The cubic root of 397693800 is about 735.3875507184.

The spelling of 397693800 in words is "three hundred ninety-seven million, six hundred ninety-three thousand, eight hundred".