9138809528 has 16 divisors (see below), whose sum is σ = 17136588480. Its totient is φ = 4569052608.

The previous prime is 9138809521. The next prime is 9138809539. The reversal of 9138809528 is 8259088319.

It is a self number, because there is not a number n which added to its sum of digits gives 9138809528.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9138809521) 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, 90425 + ... + 162647.

It is an arithmetic number, because the mean of its divisors is an integer number (1071036780).

Almost surely, 2^9138809528 is an apocalyptic number.

It is an amenable number.

9138809528 is a deficient number, since it is larger than the sum of its proper divisors (7997778952).

9138809528 is a wasteful number, since it uses less digits than its factorization.

9138809528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88046 (or 88042 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 53.

The square root of 9138809528 is about 95597.1209189900. The cubic root of 9138809528 is about 2090.7232166652.

The spelling of 9138809528 in words is "nine billion, one hundred thirty-eight million, eight hundred nine thousand, five hundred twenty-eight".