138434776 has 8 divisors (see below), whose sum is σ = 259565220. Its totient is φ = 69217384.

The previous prime is 138434771. The next prime is 138434789. The reversal of 138434776 is 677434831.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138434771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8652166 + ... + 8652181.

Almost surely, 2^138434776 is an apocalyptic number.

It is an amenable number.

138434776 is a deficient number, since it is larger than the sum of its proper divisors (121130444).

138434776 is a wasteful number, since it uses less digits than its factorization.

138434776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17304353 (or 17304349 counting only the distinct ones).

The product of its digits is 338688, while the sum is 43.

The square root of 138434776 is about 11765.8308673888. The cubic root of 138434776 is about 517.3070543358.

The spelling of 138434776 in words is "one hundred thirty-eight million, four hundred thirty-four thousand, seven hundred seventy-six".