138652550 has 24 divisors (see below), whose sum is σ = 261433416. Its totient is φ = 54699840.

The previous prime is 138652517. The next prime is 138652603. The reversal of 138652550 is 55256831.

It is a self number, because there is not a number n which added to its sum of digits gives 138652550.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15344 + ... + 22643.

It is an arithmetic number, because the mean of its divisors is an integer number (10893059).

Almost surely, 2^138652550 is an apocalyptic number.

138652550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138652550 is a deficient number, since it is larger than the sum of its proper divisors (122780866).

138652550 is a wasteful number, since it uses less digits than its factorization.

138652550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38072 (or 38067 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 35.

The square root of 138652550 is about 11775.0817406929. The cubic root of 138652550 is about 517.5781736013.

The spelling of 138652550 in words is "one hundred thirty-eight million, six hundred fifty-two thousand, five hundred fifty".