138847530 has 32 divisors (see below), whose sum is σ = 333595584. Its totient is φ = 36985856.

The previous prime is 138847523. The next prime is 138847531. The reversal of 138847530 is 35748831.

It is not an unprimeable number, because it can be changed into a prime (138847531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34609 + ... + 38411.

It is an arithmetic number, because the mean of its divisors is an integer number (10424862).

Almost surely, 2^138847530 is an apocalyptic number.

138847530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138847530 is an abundant number, since it is smaller than the sum of its proper divisors (194748054).

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

138847530 is a wasteful number, since it uses less digits than its factorization.

138847530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5030.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 138847530 is about 11783.3581800775. The cubic root of 138847530 is about 517.8206745487.

The spelling of 138847530 in words is "one hundred thirty-eight million, eight hundred forty-seven thousand, five hundred thirty".