397544347872 has 480 divisors, whose sum is σ = 1397167833600. Its totient is φ = 108421327872.

The previous prime is 397544347847. The next prime is 397544347873. The reversal of 397544347872 is 278743445793.

397544347872 is a `hidden beast` number, since 3 + 9 + 7 + 54 + 43 + 478 + 72 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397544347873) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 358470454 + ... + 358471562.

It is an arithmetic number, because the mean of its divisors is an integer number (2910766320).

Almost surely, 2^397544347872 is an apocalyptic number.

397544347872 is a gapful number since it is divisible by the number (32) 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 397544347872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (698583916800).

397544347872 is an abundant number, since it is smaller than the sum of its proper divisors (999623485728).

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

397544347872 is a wasteful number, since it uses less digits than its factorization.

397544347872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2020 (or 2003 counting only the distinct ones).

The product of its digits is 142248960, while the sum is 63.

The spelling of 397544347872 in words is "three hundred ninety-seven billion, five hundred forty-four million, three hundred forty-seven thousand, eight hundred seventy-two".