138305050 has 24 divisors (see below), whose sum is σ = 277036956. Its totient is φ = 51066240.

The previous prime is 138305029. The next prime is 138305053. The reversal of 138305050 is 50503831.

It is a happy number.

138305050 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 72029169 + 66275881 = 8487^2 + 8141^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (138305053) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 105739 + ... + 107038.

Almost surely, 2^138305050 is an apocalyptic number.

138305050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138305050 is an abundant number, since it is smaller than the sum of its proper divisors (138731906).

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

138305050 is a wasteful number, since it uses less digits than its factorization.

138305050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212802 (or 212797 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 138305050 is about 11760.3167474350. The cubic root of 138305050 is about 517.1454158855.

Adding to 138305050 its reverse (50503831), we get a palindrome (188808881).

The spelling of 138305050 in words is "one hundred thirty-eight million, three hundred five thousand, fifty".