138683650 has 24 divisors (see below), whose sum is σ = 294802560. Its totient is φ = 47548560.

The previous prime is 138683599. The next prime is 138683693. The reversal of 138683650 is 56386831.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 197770 + ... + 198469.

It is an arithmetic number, because the mean of its divisors is an integer number (12283440).

Almost surely, 2^138683650 is an apocalyptic number.

138683650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138683650 is an abundant number, since it is smaller than the sum of its proper divisors (156118910).

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

138683650 is a wasteful number, since it uses less digits than its factorization.

138683650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396258 (or 396253 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 138683650 is about 11776.4022519613. The cubic root of 138683650 is about 517.6168685931.

The spelling of 138683650 in words is "one hundred thirty-eight million, six hundred eighty-three thousand, six hundred fifty".