138927770 has 16 divisors (see below), whose sum is σ = 255391488. Its totient is φ = 54388560.

The previous prime is 138927707. The next prime is 138927773. The reversal of 138927770 is 77729831.

It is not an unprimeable number, because it can be changed into a prime (138927773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147326 + ... + 148265.

It is an arithmetic number, because the mean of its divisors is an integer number (15961968).

Almost surely, 2^138927770 is an apocalyptic number.

138927770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138927770 is a deficient number, since it is larger than the sum of its proper divisors (116463718).

138927770 is a wasteful number, since it uses less digits than its factorization.

138927770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295645.

The product of its (nonzero) digits is 148176, while the sum is 44.

The square root of 138927770 is about 11786.7624901836. The cubic root of 138927770 is about 517.9204048778.

The spelling of 138927770 in words is "one hundred thirty-eight million, nine hundred twenty-seven thousand, seven hundred seventy".