13028640340 has 24 divisors (see below), whose sum is σ = 28303599240. Its totient is φ = 5031750528.

The previous prime is 13028640307. The next prime is 13028640341. The reversal of 13028640340 is 4304682031.

It can be written as a sum of positive squares in 4 ways, for example, as 148206276 + 12880434064 = 12174^2 + 113492^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13028640341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11231007 + ... + 11232166.

It is an arithmetic number, because the mean of its divisors is an integer number (1179316635).

Almost surely, 2^13028640340 is an apocalyptic number.

13028640340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13028640340 is an abundant number, since it is smaller than the sum of its proper divisors (15274958900).

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

13028640340 is a wasteful number, since it uses less digits than its factorization.

13028640340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22463211 (or 22463209 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The spelling of 13028640340 in words is "thirteen billion, twenty-eight million, six hundred forty thousand, three hundred forty".