138428654 has 32 divisors (see below), whose sum is σ = 270599616. Its totient is φ = 51540480.

The previous prime is 138428621. The next prime is 138428683. The reversal of 138428654 is 456824831.

138428654 = 1242² + 1243² + ... + 1325².

138428654 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19277 + ... + 25464.

It is an arithmetic number, because the mean of its divisors is an integer number (8456238).

Almost surely, 2^138428654 is an apocalyptic number.

138428654 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

138428654 is a deficient number, since it is larger than the sum of its proper divisors (132170962).

138428654 is a wasteful number, since it uses less digits than its factorization.

138428654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44780.

The product of its digits is 184320, while the sum is 41.

The square root of 138428654 is about 11765.5707043900. The cubic root of 138428654 is about 517.2994286015.

The spelling of 138428654 in words is "one hundred thirty-eight million, four hundred twenty-eight thousand, six hundred fifty-four".