138770344 has 8 divisors (see below), whose sum is σ = 260194410. Its totient is φ = 69385168.

The previous prime is 138770311. The next prime is 138770351. The reversal of 138770344 is 443077831.

It can be written as a sum of positive squares in only one way, i.e., 122367844 + 16402500 = 11062^2 + 4050^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 8673139 + ... + 8673154.

Almost surely, 2^138770344 is an apocalyptic number.

It is an amenable number.

138770344 is a deficient number, since it is larger than the sum of its proper divisors (121424066).

138770344 is a wasteful number, since it uses less digits than its factorization.

138770344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17346299 (or 17346295 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 37.

The square root of 138770344 is about 11780.0825124445. The cubic root of 138770344 is about 517.7247037739.

The spelling of 138770344 in words is "one hundred thirty-eight million, seven hundred seventy thousand, three hundred forty-four".