397138727700 has 1296 divisors, whose sum is σ = 1600075713600. Its totient is φ = 81476928000.

The previous prime is 397138727683. The next prime is 397138727701. The reversal of 397138727700 is 7727831793.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397138727701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 431 ways as a sum of consecutive naturals, for example, 12810926685 + ... + 12810926715.

Almost surely, 2^397138727700 is an apocalyptic number.

397138727700 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 397138727700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (800037856800).

397138727700 is an abundant number, since it is smaller than the sum of its proper divisors (1202936985900).

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

397138727700 is a wasteful number, since it uses less digits than its factorization.

397138727700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151 (or 84 counting only the distinct ones).

The product of its (nonzero) digits is 3111696, while the sum is 54.

The spelling of 397138727700 in words is "three hundred ninety-seven billion, one hundred thirty-eight million, seven hundred twenty-seven thousand, seven hundred".