138731822 has 8 divisors (see below), whose sum is σ = 208373472. Its totient is φ = 69274000.

The previous prime is 138731807. The next prime is 138731839. The reversal of 138731822 is 228137831.

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

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 3 ways as a sum of consecutive naturals, for example, 44054 + ... + 47097.

It is an arithmetic number, because the mean of its divisors is an integer number (26046684).

Almost surely, 2^138731822 is an apocalyptic number.

138731822 is a deficient number, since it is larger than the sum of its proper divisors (69641650).

138731822 is an equidigital number, since it uses as much as digits as its factorization.

138731822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91914.

The product of its digits is 16128, while the sum is 35.

The square root of 138731822 is about 11778.4473509882. The cubic root of 138731822 is about 517.6767933530.

The spelling of 138731822 in words is "one hundred thirty-eight million, seven hundred thirty-one thousand, eight hundred twenty-two".