138708344 has 16 divisors (see below), whose sum is σ = 261007920. Its totient is φ = 69106240.

The previous prime is 138708343. The next prime is 138708347. The reversal of 138708344 is 443807831.

It is a junction number, because it is equal to n+sod(n) for n = 138708298 and 138708307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138708343) 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, 28604 + ... + 33099.

It is an arithmetic number, because the mean of its divisors is an integer number (16312995).

Almost surely, 2^138708344 is an apocalyptic number.

It is an amenable number.

138708344 is a deficient number, since it is larger than the sum of its proper divisors (122299576).

138708344 is a wasteful number, since it uses less digits than its factorization.

138708344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61990 (or 61986 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 138708344 is about 11777.4506579310. The cubic root of 138708344 is about 517.6475890430.

The spelling of 138708344 in words is "one hundred thirty-eight million, seven hundred eight thousand, three hundred forty-four".