138776854 has 8 divisors (see below), whose sum is σ = 208215360. Its totient is φ = 69371736.

The previous prime is 138776849. The next prime is 138776857. The reversal of 138776854 is 458677831.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×138776854² = 38518030412274632, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 138776798 and 138776807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138776857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11227 + ... + 20089.

It is an arithmetic number, because the mean of its divisors is an integer number (26026920).

Almost surely, 2^138776854 is an apocalyptic number.

138776854 is a deficient number, since it is larger than the sum of its proper divisors (69438506).

138776854 is an equidigital number, since it uses as much as digits as its factorization.

138776854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16694.

The product of its digits is 1128960, while the sum is 49.

The square root of 138776854 is about 11780.3588230580. The cubic root of 138776854 is about 517.7327994881.

The spelling of 138776854 in words is "one hundred thirty-eight million, seven hundred seventy-six thousand, eight hundred fifty-four".