138011418 has 16 divisors (see below), whose sum is σ = 306692160. Its totient is φ = 46003788.

The previous prime is 138011413. The next prime is 138011429. The reversal of 138011418 is 814110831.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 138011391 and 138011400.

It is not an unprimeable number, because it can be changed into a prime (138011413) 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 7 ways as a sum of consecutive naturals, for example, 1277830 + ... + 1277937.

It is an arithmetic number, because the mean of its divisors is an integer number (19168260).

Almost surely, 2^138011418 is an apocalyptic number.

138011418 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

138011418 is an abundant number, since it is smaller than the sum of its proper divisors (168680742).

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

138011418 is a wasteful number, since it uses less digits than its factorization.

138011418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2555778 (or 2555772 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 27.

The square root of 138011418 is about 11747.8260967721. The cubic root of 138011418 is about 516.7791770702.

The spelling of 138011418 in words is "one hundred thirty-eight million, eleven thousand, four hundred eighteen".