1398720706560 has 288 divisors, whose sum is σ = 4865056363440. Its totient is φ = 371657932800.

The previous prime is 1398720706541. The next prime is 1398720706573. The reversal of 1398720706560 is 656070278931.

1398720706560 is a `hidden beast` number, since 1 + 3 + 9 + 8 + 7 + 2 + 0 + 70 + 6 + 560 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

It is a super-2 number, since 2×1398720706560² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1398720706497 and 1398720706506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25869955 + ... + 25923965.

Almost surely, 2^{1398720706560} is an apocalyptic number.

1398720706560 is a gapful number since it is divisible by the number (10) 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 1398720706560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2432528181720).

1398720706560 is an abundant number, since it is smaller than the sum of its proper divisors (3466335656880).

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

1398720706560 is a wasteful number, since it uses less digits than its factorization.

1398720706560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54325 (or 54302 counting only the distinct ones).

The product of its (nonzero) digits is 3810240, while the sum is 54.

The spelling of 1398720706560 in words is "one trillion, three hundred ninety-eight billion, seven hundred twenty million, seven hundred six thousand, five hundred sixty".