138766038 has 16 divisors (see below), whose sum is σ = 289598976. Its totient is φ = 44244200.

The previous prime is 138766037. The next prime is 138766039. The reversal of 138766038 is 830667831.

It is an interprime number because it is at equal distance from previous prime (138766037) and next prime (138766039).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138766037) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 502638 + ... + 502913.

It is an arithmetic number, because the mean of its divisors is an integer number (18099936).

Almost surely, 2^138766038 is an apocalyptic number.

138766038 is an abundant number, since it is smaller than the sum of its proper divisors (150832938).

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

138766038 is a wasteful number, since it uses less digits than its factorization.

138766038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1005579.

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 138766038 is about 11779.8997449045. The cubic root of 138766038 is about 517.7193487738.

The spelling of 138766038 in words is "one hundred thirty-eight million, seven hundred sixty-six thousand, thirty-eight".