138650415 has 16 divisors (see below), whose sum is σ = 223440000. Its totient is φ = 73413792.

The previous prime is 138650387. The next prime is 138650437. The reversal of 138650415 is 514056831.

It is a de Polignac number, because none of the positive numbers 2^k-138650415 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31165 + ... + 35334.

It is an arithmetic number, because the mean of its divisors is an integer number (13965000).

Almost surely, 2^138650415 is an apocalyptic number.

138650415 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

138650415 is a deficient number, since it is larger than the sum of its proper divisors (84789585).

138650415 is a wasteful number, since it uses less digits than its factorization.

138650415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66646.

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 138650415 is about 11774.9910827992. The cubic root of 138650415 is about 517.5755169965.

The spelling of 138650415 in words is "one hundred thirty-eight million, six hundred fifty thousand, four hundred fifteen".