397673297280 has 2560 divisors, whose sum is σ = 1842650726400. Its totient is φ = 79705866240.

The previous prime is 397673297267. The next prime is 397673297327. The reversal of 397673297280 is 82792376793.

397673297280 is a `hidden beast` number, since 3 + 9 + 7 + 67 + 3 + 297 + 280 = 666.

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

It is a congruent number.

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 319 ways as a sum of consecutive naturals, for example, 7503269734 + ... + 7503269786.

It is an arithmetic number, because the mean of its divisors is an integer number (719785440).

Almost surely, 2^397673297280 is an apocalyptic number.

397673297280 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 397673297280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (921325363200).

397673297280 is an abundant number, since it is smaller than the sum of its proper divisors (1444977429120).

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

397673297280 is a wasteful number, since it uses less digits than its factorization.

397673297280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174 (or 153 counting only the distinct ones).

The product of its (nonzero) digits is 48009024, while the sum is 63.

The spelling of 397673297280 in words is "three hundred ninety-seven billion, six hundred seventy-three million, two hundred ninety-seven thousand, two hundred eighty".