138468072 has 32 divisors (see below), whose sum is σ = 357338880. Its totient is φ = 44666880.

The previous prime is 138468049. The next prime is 138468101. The reversal of 138468072 is 270864831.

It is a self number, because there is not a number n which added to its sum of digits gives 138468072.

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 7 ways as a sum of consecutive naturals, for example, 92313 + ... + 93800.

It is an arithmetic number, because the mean of its divisors is an integer number (11166840).

Almost surely, 2^138468072 is an apocalyptic number.

138468072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

138468072 is an abundant number, since it is smaller than the sum of its proper divisors (218870808).

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

138468072 is a wasteful number, since it uses less digits than its factorization.

138468072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186153 (or 186149 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 138468072 is about 11767.2457270170. The cubic root of 138468072 is about 517.3485248282.

The spelling of 138468072 in words is "one hundred thirty-eight million, four hundred sixty-eight thousand, seventy-two".