138859550 has 24 divisors (see below), whose sum is σ = 258594312. Its totient is φ = 55476000.

The previous prime is 138859549. The next prime is 138859559. The reversal of 138859550 is 55958831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138859559) 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, 68045 + ... + 70055.

It is an arithmetic number, because the mean of its divisors is an integer number (10774763).

Almost surely, 2^138859550 is an apocalyptic number.

138859550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138859550 is a deficient number, since it is larger than the sum of its proper divisors (119734762).

138859550 is a wasteful number, since it uses less digits than its factorization.

138859550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3404 (or 3399 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 44.

The square root of 138859550 is about 11783.8682103968. The cubic root of 138859550 is about 517.8356166580.

The spelling of 138859550 in words is "one hundred thirty-eight million, eight hundred fifty-nine thousand, five hundred fifty".