397905169344 has 168 divisors, whose sum is σ = 1154443703808. Its totient is φ = 120805601280.

The previous prime is 397905169297. The next prime is 397905169349. The reversal of 397905169344 is 443961509793.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397905169349) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1604467 + ... + 1835789.

Almost surely, 2^397905169344 is an apocalyptic number.

397905169344 is a gapful number since it is divisible by the number (34) 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 397905169344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (577221851904).

397905169344 is an abundant number, since it is smaller than the sum of its proper divisors (756538534464).

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

397905169344 is a wasteful number, since it uses less digits than its factorization.

397905169344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231403 (or 231376 counting only the distinct ones).

The product of its (nonzero) digits is 22044960, while the sum is 60.

The spelling of 397905169344 in words is "three hundred ninety-seven billion, nine hundred five million, one hundred sixty-nine thousand, three hundred forty-four".