138501044 has 12 divisors (see below), whose sum is σ = 264411168. Its totient is φ = 62955000.

The previous prime is 138501043. The next prime is 138501053. The reversal of 138501044 is 440105831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138501043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1573832 + ... + 1573919.

It is an arithmetic number, because the mean of its divisors is an integer number (22034264).

Almost surely, 2^138501044 is an apocalyptic number.

It is an amenable number.

138501044 is a deficient number, since it is larger than the sum of its proper divisors (125910124).

138501044 is a wasteful number, since it uses less digits than its factorization.

138501044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3147766 (or 3147764 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 138501044 is about 11768.6466511660. The cubic root of 138501044 is about 517.3895852246.

Adding to 138501044 its reverse (440105831), we get a palindrome (578606875).

The spelling of 138501044 in words is "one hundred thirty-eight million, five hundred one thousand, forty-four".