138650980 has 144 divisors (see below), whose sum is σ = 354170880. Its totient is φ = 45287424.

The previous prime is 138650977. The next prime is 138650983. The reversal of 138650980 is 89056831.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (138650977) and next prime (138650983).

It is not an unprimeable number, because it can be changed into a prime (138650983) 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 47 ways as a sum of consecutive naturals, for example, 1091677 + ... + 1091803.

It is an arithmetic number, because the mean of its divisors is an integer number (2459520).

Almost surely, 2^138650980 is an apocalyptic number.

138650980 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 138650980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177085440).

138650980 is an abundant number, since it is smaller than the sum of its proper divisors (215519900).

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

138650980 is a wasteful number, since it uses less digits than its factorization.

138650980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198 (or 183 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 138650980 is about 11775.0150743003. The cubic root of 138650980 is about 517.5762200351.

The spelling of 138650980 in words is "one hundred thirty-eight million, six hundred fifty thousand, nine hundred eighty".