138967776 has 36 divisors (see below), whose sum is σ = 395190432. Its totient is φ = 46322496.

The previous prime is 138967747. The next prime is 138967781. The reversal of 138967776 is 677769831.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 240976 + ... + 241551.

It is an arithmetic number, because the mean of its divisors is an integer number (10977512).

Almost surely, 2^138967776 is an apocalyptic number.

138967776 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

138967776 is an abundant number, since it is smaller than the sum of its proper divisors (256222656).

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

138967776 is a wasteful number, since it uses less digits than its factorization.

138967776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482543 (or 482532 counting only the distinct ones).

The product of its digits is 2667168, while the sum is 54.

The square root of 138967776 is about 11788.4594413350. The cubic root of 138967776 is about 517.9701140065.

The spelling of 138967776 in words is "one hundred thirty-eight million, nine hundred sixty-seven thousand, seven hundred seventy-six".