138590738 has 24 divisors (see below), whose sum is σ = 246085644. Its totient is φ = 58148640.

The previous prime is 138590737. The next prime is 138590741. The reversal of 138590738 is 837095831.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 137757169 + 833569 = 11737^2 + 913^2 .

It is not an unprimeable number, because it can be changed into a prime (138590737) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18881 + ... + 25172.

Almost surely, 2^138590738 is an apocalyptic number.

138590738 is a deficient number, since it is larger than the sum of its proper divisors (107494906).

138590738 is a wasteful number, since it uses less digits than its factorization.

138590738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44090 (or 44079 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 138590738 is about 11772.4567529467. The cubic root of 138590738 is about 517.5012491899.

The spelling of 138590738 in words is "one hundred thirty-eight million, five hundred ninety thousand, seven hundred thirty-eight".