144307138 has 8 divisors (see below), whose sum is σ = 216531900. Its totient is φ = 72129840.

The previous prime is 144307133. The next prime is 144307153. The reversal of 144307138 is 831703441.

144307138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 138368169 + 5938969 = 11763^2 + 2437^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (144307133) 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, 2913 + ... + 17236.

Almost surely, 2^144307138 is an apocalyptic number.

144307138 is a deficient number, since it is larger than the sum of its proper divisors (72224762).

144307138 is a wasteful number, since it uses less digits than its factorization.

144307138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23732.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 144307138 is about 12012.7906000230. The cubic root of 144307138 is about 524.5206666514.

The spelling of 144307138 in words is "one hundred forty-four million, three hundred seven thousand, one hundred thirty-eight".