397356228480 has 256 divisors, whose sum is σ = 1349768448000. Its totient is φ = 99197632512.

The previous prime is 397356228469. The next prime is 397356228523. The reversal of 397356228480 is 84822653793.

It is a super-2 number, since 2×397356228480² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 397356228480.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1979796 + ... + 2171244.

It is an arithmetic number, because the mean of its divisors is an integer number (5272533000).

Almost surely, 2^397356228480 is an apocalyptic number.

397356228480 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 397356228480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (674884224000).

397356228480 is an abundant number, since it is smaller than the sum of its proper divisors (952412219520).

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

397356228480 is a wasteful number, since it uses less digits than its factorization.

397356228480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191541 (or 191529 counting only the distinct ones).

The product of its (nonzero) digits is 17418240, while the sum is 57.

The spelling of 397356228480 in words is "three hundred ninety-seven billion, three hundred fifty-six million, two hundred twenty-eight thousand, four hundred eighty".