397587665340 has 144 divisors (see below), whose sum is σ = 1217621364960. Its totient is φ = 105003993600.

The previous prime is 397587665327. The next prime is 397587665401. The reversal of 397587665340 is 43566785793.

397587665340 is a `hidden beast` number, since 3 + 9 + 7 + 587 + 6 + 6 + 5 + 3 + 40 = 666.

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 47 ways as a sum of consecutive naturals, for example, 85482015 + ... + 85486665.

Almost surely, 2^397587665340 is an apocalyptic number.

397587665340 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 397587665340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (608810682480).

397587665340 is an abundant number, since it is smaller than the sum of its proper divisors (820033699620).

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

397587665340 is a wasteful number, since it uses less digits than its factorization.

397587665340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9132 (or 9127 counting only the distinct ones).

The product of its (nonzero) digits is 114307200, while the sum is 63.

The spelling of 397587665340 in words is "three hundred ninety-seven billion, five hundred eighty-seven million, six hundred sixty-five thousand, three hundred forty".