397567649280 has 640 divisors, whose sum is σ = 1391568076800. Its totient is φ = 96458342400.

The previous prime is 397567649263. The next prime is 397567649317. The reversal of 397567649280 is 82946765793.

It is a tau number, because it is divible by the number of its divisors (640).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 809709835 + ... + 809710325.

It is an arithmetic number, because the mean of its divisors is an integer number (2174325120).

Almost surely, 2^397567649280 is an apocalyptic number.

397567649280 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 397567649280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (695784038400).

397567649280 is an abundant number, since it is smaller than the sum of its proper divisors (994000427520).

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

397567649280 is a wasteful number, since it uses less digits than its factorization.

397567649280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746 (or 730 counting only the distinct ones).

The product of its (nonzero) digits is 137168640, while the sum is 66.

The spelling of 397567649280 in words is "three hundred ninety-seven billion, five hundred sixty-seven million, six hundred forty-nine thousand, two hundred eighty".