138756832 has 12 divisors (see below), whose sum is σ = 273177576. Its totient is φ = 69378400.

The previous prime is 138756823. The next prime is 138756853. The reversal of 138756832 is 238657831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2168044 + ... + 2168107.

It is an arithmetic number, because the mean of its divisors is an integer number (22764798).

Almost surely, 2^138756832 is an apocalyptic number.

It is an amenable number.

138756832 is a deficient number, since it is larger than the sum of its proper divisors (134420744).

138756832 is an equidigital number, since it uses as much as digits as its factorization.

138756832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4336161 (or 4336153 counting only the distinct ones).

The product of its digits is 241920, while the sum is 43.

The square root of 138756832 is about 11779.5089880691. The cubic root of 138756832 is about 517.7078996954.

Subtracting 138756832 from its reverse (238657831), we obtain a palindrome (99900999).

The spelling of 138756832 in words is "one hundred thirty-eight million, seven hundred fifty-six thousand, eight hundred thirty-two".