397812280320 has 1760 divisors, whose sum is σ = 1789623779328. Its totient is φ = 82269831168.

The previous prime is 397812280291. The next prime is 397812280339. The reversal of 397812280320 is 23082218793.

397812280320 is a `hidden beast` number, since 39 + 7 + 8 + 12 + 280 + 320 = 666.

It is a super-2 number, since 2×397812280320² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 3132380097 + ... + 3132380223.

Almost surely, 2^397812280320 is an apocalyptic number.

397812280320 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 397812280320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (894811889664).

397812280320 is an abundant number, since it is smaller than the sum of its proper divisors (1391811499008).

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

397812280320 is a wasteful number, since it uses less digits than its factorization.

397812280320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267 (or 240 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 397812280320 in words is "three hundred ninety-seven billion, eight hundred twelve million, two hundred eighty thousand, three hundred twenty".