13279390320 has 320 divisors, whose sum is σ = 49676820480. Its totient is φ = 2866627584.

The previous prime is 13279390309. The next prime is 13279390343. The reversal of 13279390320 is 2309397231.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 20524237 + ... + 20524883.

It is an arithmetic number, because the mean of its divisors is an integer number (155240064).

Almost surely, 2^13279390320 is an apocalyptic number.

13279390320 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 13279390320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24838410240).

13279390320 is an abundant number, since it is smaller than the sum of its proper divisors (36397430160).

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

13279390320 is a wasteful number, since it uses less digits than its factorization.

13279390320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332 (or 1326 counting only the distinct ones).

The product of its (nonzero) digits is 61236, while the sum is 39.

The spelling of 13279390320 in words is "thirteen billion, two hundred seventy-nine million, three hundred ninety thousand, three hundred twenty".