138030040 has 16 divisors (see below), whose sum is σ = 310567680. Its totient is φ = 55212000.

The previous prime is 138030031. The next prime is 138030049. The reversal of 138030040 is 40030831.

It is an interprime number because it is at equal distance from previous prime (138030031) and next prime (138030049).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138030049) 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, 1725336 + ... + 1725415.

It is an arithmetic number, because the mean of its divisors is an integer number (19410480).

Almost surely, 2^138030040 is an apocalyptic number.

138030040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138030040 is an abundant number, since it is smaller than the sum of its proper divisors (172537640).

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

138030040 is a wasteful number, since it uses less digits than its factorization.

138030040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3450762 (or 3450758 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 138030040 is about 11748.6186422064. The cubic root of 138030040 is about 516.8024191786.

Adding to 138030040 its reverse (40030831), we get a palindrome (178060871).

The spelling of 138030040 in words is "one hundred thirty-eight million, thirty thousand, forty".