138775650 has 48 divisors (see below), whose sum is σ = 370642944. Its totient is φ = 34159680.

The previous prime is 138775649. The next prime is 138775661. The reversal of 138775650 is 56577831.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33634 + ... + 37533.

It is an arithmetic number, because the mean of its divisors is an integer number (7721728).

Almost surely, 2^138775650 is an apocalyptic number.

138775650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138775650 is an abundant number, since it is smaller than the sum of its proper divisors (231867294).

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

138775650 is a wasteful number, since it uses less digits than its factorization.

138775650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71195 (or 71190 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 42.

The square root of 138775650 is about 11780.3077209384. The cubic root of 138775650 is about 517.7313022353.

The spelling of 138775650 in words is "one hundred thirty-eight million, seven hundred seventy-five thousand, six hundred fifty".