138030550 has 72 divisors (see below), whose sum is σ = 304574256. Its totient is φ = 46388160.

The previous prime is 138030511. The next prime is 138030583. The reversal of 138030550 is 55030831.

It is a happy number.

138030550 is digitally balanced in base 2 and base 3, because in such bases 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 (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 129319 + ... + 130381.

It is an arithmetic number, because the mean of its divisors is an integer number (4230198).

Almost surely, 2^138030550 is an apocalyptic number.

138030550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138030550 is an abundant number, since it is smaller than the sum of its proper divisors (166543706).

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

138030550 is a wasteful number, since it uses less digits than its factorization.

138030550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1142 (or 1130 counting only the distinct ones).

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

The square root of 138030550 is about 11748.6403468657. The cubic root of 138030550 is about 516.8030556799.

The spelling of 138030550 in words is "one hundred thirty-eight million, thirty thousand, five hundred fifty".