397940085760 has 528 divisors, whose sum is σ = 1207039587840. Its totient is φ = 125039738880.

The previous prime is 397940085733. The next prime is 397940085769. The reversal of 397940085760 is 67580049793.

It is a junction number, because it is equal to n+sod(n) for n = 397940085695 and 397940085704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397940085769) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 147766974 + ... + 147769666.

Almost surely, 2^397940085760 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 397940085760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (603519793920).

397940085760 is an abundant number, since it is smaller than the sum of its proper divisors (809099502080).

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

397940085760 is a wasteful number, since it uses less digits than its factorization.

397940085760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2782 (or 2757 counting only the distinct ones).

The product of its (nonzero) digits is 11430720, while the sum is 58.

The spelling of 397940085760 in words is "three hundred ninety-seven billion, nine hundred forty million, eighty-five thousand, seven hundred sixty".