898443980640 has 576 divisors, whose sum is σ = 3286770177600. Its totient is φ = 222698668032.

The previous prime is 898443980633. The next prime is 898443980647. The reversal of 898443980640 is 46089344898.

898443980640 is a `hidden beast` number, since 8 + 9 + 84 + 439 + 80 + 6 + 40 = 666.

It is an interprime number because it is at equal distance from previous prime (898443980633) and next prime (898443980647).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (898443980647) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 779222304 + ... + 779223456.

It is an arithmetic number, because the mean of its divisors is an integer number (5706198225).

Almost surely, 2^898443980640 is an apocalyptic number.

898443980640 is a gapful number since it is divisible by the number (80) 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 898443980640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1643385088800).

898443980640 is an abundant number, since it is smaller than the sum of its proper divisors (2388326196960).

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

898443980640 is a wasteful number, since it uses less digits than its factorization.

898443980640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1559 (or 1548 counting only the distinct ones).

The product of its (nonzero) digits is 47775744, while the sum is 63.

The spelling of 898443980640 in words is "eight hundred ninety-eight billion, four hundred forty-three million, nine hundred eighty thousand, six hundred forty".