138477415 has 32 divisors (see below), whose sum is σ = 181209600. Its totient is φ = 101243520.

The previous prime is 138477413. The next prime is 138477433. The reversal of 138477415 is 514774831.

It is a happy number.

It is not a de Polignac number, because 138477415 - 2¹ = 138477413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138477413) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 445110 + ... + 445420.

It is an arithmetic number, because the mean of its divisors is an integer number (5662800).

Almost surely, 2^138477415 is an apocalyptic number.

138477415 is a deficient number, since it is larger than the sum of its proper divisors (42732185).

138477415 is a wasteful number, since it uses less digits than its factorization.

138477415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487.

The product of its digits is 94080, while the sum is 40.

The square root of 138477415 is about 11767.6427121153. The cubic root of 138477415 is about 517.3601604312.

The spelling of 138477415 in words is "one hundred thirty-eight million, four hundred seventy-seven thousand, four hundred fifteen".