138340752 has 60 divisors (see below), whose sum is σ = 392839440. Its totient is φ = 41919680.

The previous prime is 138340739. The next prime is 138340801. The reversal of 138340752 is 257043831.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 6102 + ... + 17717.

It is an arithmetic number, because the mean of its divisors is an integer number (6547324).

Almost surely, 2^138340752 is an apocalyptic number.

138340752 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

138340752 is an abundant number, since it is smaller than the sum of its proper divisors (254498688).

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

138340752 is a wasteful number, since it uses less digits than its factorization.

138340752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23852 (or 23835 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 138340752 is about 11761.8345507833. The cubic root of 138340752 is about 517.1899106145.

The spelling of 138340752 in words is "one hundred thirty-eight million, three hundred forty thousand, seven hundred fifty-two".