138273672 has 16 divisors (see below), whose sum is σ = 345684240. Its totient is φ = 46091216.

The previous prime is 138273643. The next prime is 138273673. The reversal of 138273672 is 276372831.

It is a self number, because there is not a number n which added to its sum of digits gives 138273672.

It is not an unprimeable number, because it can be changed into a prime (138273673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2880678 + ... + 2880725.

It is an arithmetic number, because the mean of its divisors is an integer number (21605265).

Almost surely, 2^138273672 is an apocalyptic number.

138273672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

138273672 is an abundant number, since it is smaller than the sum of its proper divisors (207410568).

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

138273672 is a wasteful number, since it uses less digits than its factorization.

138273672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5761412 (or 5761408 counting only the distinct ones).

The product of its digits is 84672, while the sum is 39.

The square root of 138273672 is about 11758.9826090525. The cubic root of 138273672 is about 517.1063037533.

The spelling of 138273672 in words is "one hundred thirty-eight million, two hundred seventy-three thousand, six hundred seventy-two".