13263872728 has 16 divisors (see below), whose sum is σ = 24874632000. Its totient is φ = 6630637536.

The previous prime is 13263872723. The next prime is 13263872759. The reversal of 13263872728 is 82727836231.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13263872723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118248 + ... + 201271.

It is an arithmetic number, because the mean of its divisors is an integer number (1554664500).

Almost surely, 2^13263872728 is an apocalyptic number.

It is an amenable number.

13263872728 is a deficient number, since it is larger than the sum of its proper divisors (11610759272).

13263872728 is a wasteful number, since it uses less digits than its factorization.

13263872728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324714 (or 324710 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 49.

The spelling of 13263872728 in words is "thirteen billion, two hundred sixty-three million, eight hundred seventy-two thousand, seven hundred twenty-eight".