138061080 has 144 divisors (see below), whose sum is σ = 477004320. Its totient is φ = 34624512.

The previous prime is 138061067. The next prime is 138061081. The reversal of 138061080 is 80160831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138061081) 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 35 ways as a sum of consecutive naturals, for example, 103377 + ... + 104703.

It is an arithmetic number, because the mean of its divisors is an integer number (3312530).

Almost surely, 2^138061080 is an apocalyptic number.

138061080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138061080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (238502160).

138061080 is an abundant number, since it is smaller than the sum of its proper divisors (338943240).

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

138061080 is a wasteful number, since it uses less digits than its factorization.

138061080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1378 (or 1354 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 138061080 is about 11749.9395743127. The cubic root of 138061080 is about 516.8411555406.

The spelling of 138061080 in words is "one hundred thirty-eight million, sixty-one thousand, eighty".