398821717580 has 384 divisors, whose sum is σ = 1052938656000. Its totient is φ = 125597122560.

The previous prime is 398821717559. The next prime is 398821717597. The reversal of 398821717580 is 85717128893.

It is a super-2 number, since 2×398821717580² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 518623436 + ... + 518624204.

It is an arithmetic number, because the mean of its divisors is an integer number (2742027750).

Almost surely, 2^398821717580 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 398821717580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (526469328000).

398821717580 is an abundant number, since it is smaller than the sum of its proper divisors (654116938420).

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

398821717580 is a wasteful number, since it uses less digits than its factorization.

398821717580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 894 (or 866 counting only the distinct ones).

The product of its (nonzero) digits is 6773760, while the sum is 59.

The spelling of 398821717580 in words is "three hundred ninety-eight billion, eight hundred twenty-one million, seven hundred seventeen thousand, five hundred eighty".