138723882 has 32 divisors (see below), whose sum is σ = 307641024. Its totient is φ = 41347200.

The previous prime is 138723881. The next prime is 138723911. The reversal of 138723882 is 288327831.

It is not an unprimeable number, because it can be changed into a prime (138723881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13203 + ... + 21254.

It is an arithmetic number, because the mean of its divisors is an integer number (9613782).

Almost surely, 2^138723882 is an apocalyptic number.

138723882 is an abundant number, since it is smaller than the sum of its proper divisors (168917142).

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

138723882 is a wasteful number, since it uses less digits than its factorization.

138723882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34534.

The product of its digits is 129024, while the sum is 42.

The square root of 138723882 is about 11778.1102898555. The cubic root of 138723882 is about 517.6669171470. Note that the first 3 decimals are identical.

The spelling of 138723882 in words is "one hundred thirty-eight million, seven hundred twenty-three thousand, eight hundred eighty-two".