144287428 has 12 divisors (see below), whose sum is σ = 254198700. Its totient is φ = 71659232.

The previous prime is 144287413. The next prime is 144287431. The reversal of 144287428 is 824782441.

It can be written as a sum of positive squares in 2 ways, for example, as 23990404 + 120297024 = 4898^2 + 10968^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120451 + ... + 121642.

It is an arithmetic number, because the mean of its divisors is an integer number (21183225).

Almost surely, 2^144287428 is an apocalyptic number.

It is an amenable number.

144287428 is a deficient number, since it is larger than the sum of its proper divisors (109911272).

144287428 is a wasteful number, since it uses less digits than its factorization.

144287428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242246 (or 242244 counting only the distinct ones).

The product of its digits is 114688, while the sum is 40.

The square root of 144287428 is about 12011.9701964332. The cubic root of 144287428 is about 524.4967852431.

The spelling of 144287428 in words is "one hundred forty-four million, two hundred eighty-seven thousand, four hundred twenty-eight".