144237728 has 12 divisors (see below), whose sum is σ = 283968090. Its totient is φ = 72118848.

The previous prime is 144237727. The next prime is 144237749. The reversal of 144237728 is 827732441.

It can be written as a sum of positive squares in only one way, i.e., 128777104 + 15460624 = 11348^2 + 3932^2 .

It is a junction number, because it is equal to n+sod(n) for n = 144237691 and 144237700.

It is not an unprimeable number, because it can be changed into a prime (144237727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2253683 + ... + 2253746.

Almost surely, 2^144237728 is an apocalyptic number.

It is an amenable number.

144237728 is a deficient number, since it is larger than the sum of its proper divisors (139730362).

144237728 is an equidigital number, since it uses as much as digits as its factorization.

144237728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4507439 (or 4507431 counting only the distinct ones).

The product of its digits is 75264, while the sum is 38.

The square root of 144237728 is about 12009.9012485532. The cubic root of 144237728 is about 524.4365571180.

The spelling of 144237728 in words is "one hundred forty-four million, two hundred thirty-seven thousand, seven hundred twenty-eight".