397200000 has 192 divisors, whose sum is σ = 1322727840. Its totient is φ = 105600000.

The previous prime is 397199953. The next prime is 397200017. The reversal of 397200000 is 2793.

It is a tau number, because it is divible by the number of its divisors (192).

It is a self number, because there is not a number n which added to its sum of digits gives 397200000.

It is an unprimeable number.

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, 1199835 + ... + 1200165.

Almost surely, 2^397200000 is an apocalyptic number.

397200000 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 397200000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (661363920).

397200000 is an abundant number, since it is smaller than the sum of its proper divisors (925527840).

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

397200000 is an frugal number, since it uses more digits than its factorization.

397200000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373 (or 341 counting only the distinct ones).

The product of its (nonzero) digits is 378, while the sum is 21.

The square root of 397200000 is about 19929.8770693650. The cubic root of 397200000 is about 735.0830578543.

Adding to 397200000 its reverse (2793), we get a palindrome (397202793).

The spelling of 397200000 in words is "three hundred ninety-seven million, two hundred thousand".