13398979072 has 40 divisors (see below), whose sum is σ = 26863460316. Its totient is φ = 6676549632.

The previous prime is 13398979057. The next prime is 13398979147. The reversal of 13398979072 is 27097989331.

It can be written as a sum of positive squares in 2 ways, for example, as 12684165376 + 714813696 = 112624^2 + 26736^2 .

It is a super-3 number, since 3×13398979072³ (a number of 31 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13398978998 and 13398979016.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105358 + ... + 194674.

Almost surely, 2^13398979072 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 13398979072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13431730158).

13398979072 is an abundant number, since it is smaller than the sum of its proper divisors (13464481244).

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

13398979072 is an frugal number, since it uses more digits than its factorization.

13398979072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89628 (or 89612 counting only the distinct ones).

The product of its (nonzero) digits is 5143824, while the sum is 58.

The spelling of 13398979072 in words is "thirteen billion, three hundred ninety-eight million, nine hundred seventy-nine thousand, seventy-two".