10728991908 has 36 divisors (see below), whose sum is σ = 27400109100. Its totient is φ = 3539460096.

The previous prime is 10728991901. The next prime is 10728991937. The reversal of 10728991908 is 80919982701.

It can be written as a sum of positive squares in 2 ways, for example, as 4896920484 + 5832071424 = 69978^2 + 76368^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×10728991908² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10728991901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1532733 + ... + 1539716.

Almost surely, 2^10728991908 is an apocalyptic number.

10728991908 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

10728991908 is an abundant number, since it is smaller than the sum of its proper divisors (16671117192).

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

10728991908 is a wasteful number, since it uses less digits than its factorization.

10728991908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3072556 (or 3072551 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 54.

The spelling of 10728991908 in words is "ten billion, seven hundred twenty-eight million, nine hundred ninety-one thousand, nine hundred eight".