138030750 has 288 divisors, whose sum is σ = 455626080. Its totient is φ = 30888000.

The previous prime is 138030707. The next prime is 138030773. The reversal of 138030750 is 57030831.

138030750 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 10617744 + ... + 10617756.

It is an arithmetic number, because the mean of its divisors is an integer number (1582035).

Almost surely, 2^138030750 is an apocalyptic number.

138030750 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 138030750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (227813040).

138030750 is an abundant number, since it is smaller than the sum of its proper divisors (317595330).

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

138030750 is a wasteful number, since it uses less digits than its factorization.

138030750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74 (or 34 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 138030750 is about 11748.6488584858. The cubic root of 138030750 is about 516.8033052879.

The spelling of 138030750 in words is "one hundred thirty-eight million, thirty thousand, seven hundred fifty".