9138623380 has 24 divisors (see below), whose sum is σ = 19206929448. Its totient is φ = 3652435968.

The previous prime is 9138623357. The next prime is 9138623381. The reversal of 9138623380 is 833268319.

It can be written as a sum of positive squares in 4 ways, for example, as 710648964 + 8427974416 = 26658^2 + 91804^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9138623381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163389 + ... + 212068.

It is an arithmetic number, because the mean of its divisors is an integer number (800288727).

Almost surely, 2^9138623380 is an apocalyptic number.

It is an amenable number.

9138623380 is an abundant number, since it is smaller than the sum of its proper divisors (10068306068).

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

9138623380 is a wasteful number, since it uses less digits than its factorization.

9138623380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376683 (or 376681 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 9138623380 is about 95596.1473073052. The cubic root of 9138623380 is about 2090.7090212865.

The spelling of 9138623380 in words is "nine billion, one hundred thirty-eight million, six hundred twenty-three thousand, three hundred eighty".