397655930880 has 1152 divisors, whose sum is σ = 1622705011200. Its totient is φ = 92589391872.

The previous prime is 397655930869. The next prime is 397655930927. The reversal of 397655930880 is 88039556793.

397655930880 is a `hidden beast` number, since 3 + 9 + 76 + 559 + 3 + 0 + 8 + 8 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1152).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 614614717 + ... + 614615363.

It is an arithmetic number, because the mean of its divisors is an integer number (1408598100).

Almost surely, 2^397655930880 is an apocalyptic number.

397655930880 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 397655930880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (811352505600).

397655930880 is an abundant number, since it is smaller than the sum of its proper divisors (1225049080320).

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

397655930880 is a wasteful number, since it uses less digits than its factorization.

397655930880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721 (or 689 counting only the distinct ones).

The product of its (nonzero) digits is 48988800, while the sum is 63.

The spelling of 397655930880 in words is "three hundred ninety-seven billion, six hundred fifty-five million, nine hundred thirty thousand, eight hundred eighty".