138003540 has 48 divisors (see below), whose sum is σ = 395841600. Its totient is φ = 35902720.

The previous prime is 138003539. The next prime is 138003557. The reversal of 138003540 is 45300831.

It is a self number, because there is not a number n which added to its sum of digits gives 138003540.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 25590 + ... + 30509.

It is an arithmetic number, because the mean of its divisors is an integer number (8246700).

Almost surely, 2^138003540 is an apocalyptic number.

138003540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138003540 is an abundant number, since it is smaller than the sum of its proper divisors (257838060).

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

138003540 is a wasteful number, since it uses less digits than its factorization.

138003540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56152 (or 56150 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 138003540 is about 11747.4907959104. The cubic root of 138003540 is about 516.7693439132.

The spelling of 138003540 in words is "one hundred thirty-eight million, three thousand, five hundred forty".