144620428 has 12 divisors (see below), whose sum is σ = 267973272. Its totient is φ = 68056640.

The previous prime is 144620423. The next prime is 144620429. The reversal of 144620428 is 824026441.

It is a self number, because there is not a number n which added to its sum of digits gives 144620428.

It is not an unprimeable number, because it can be changed into a prime (144620423) 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, 1063318 + ... + 1063453.

It is an arithmetic number, because the mean of its divisors is an integer number (22331106).

Almost surely, 2^144620428 is an apocalyptic number.

It is an amenable number.

144620428 is a deficient number, since it is larger than the sum of its proper divisors (123352844).

144620428 is a wasteful number, since it uses less digits than its factorization.

144620428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2126792 (or 2126790 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 31.

The square root of 144620428 is about 12025.8233813739. The cubic root of 144620428 is about 524.8999694529.

Adding to 144620428 its reverse (824026441), we get a palindrome (968646869).

The spelling of 144620428 in words is "one hundred forty-four million, six hundred twenty thousand, four hundred twenty-eight".