397800000 has 504 divisors, whose sum is σ = 1625099112. Its totient is φ = 92160000.

The previous prime is 397799959. The next prime is 397800037. The reversal of 397800000 is 8793.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 397763136 + 36864 = 19944^2 + 192^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 23399992 + ... + 23400008.

It is an arithmetic number, because the mean of its divisors is an integer number (3224403).

Almost surely, 2^397800000 is an apocalyptic number.

397800000 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 397800000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (812549556).

397800000 is an abundant number, since it is smaller than the sum of its proper divisors (1227299112).

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

397800000 is a wasteful number, since it uses less digits than its factorization.

397800000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73 (or 40 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 397800000 is about 19944.9241663136. The cubic root of 397800000 is about 735.4530040958.

Adding to 397800000 its reverse (8793), we get a palindrome (397808793).

The spelling of 397800000 in words is "three hundred ninety-seven million, eight hundred thousand".