144771228 has 36 divisors (see below), whose sum is σ = 418228720. Its totient is φ = 41363136.

The previous prime is 144771217. The next prime is 144771229. The reversal of 144771228 is 822177441.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 144771192 and 144771201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144771229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 286993 + ... + 287496.

Almost surely, 2^144771228 is an apocalyptic number.

144771228 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

144771228 is an abundant number, since it is smaller than the sum of its proper divisors (273457492).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

144771228 is a wasteful number, since it uses less digits than its factorization.

144771228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574506 (or 574501 counting only the distinct ones).

The product of its digits is 25088, while the sum is 36.

The square root of 144771228 is about 12032.0915887472. The cubic root of 144771228 is about 525.0823489872.

The spelling of 144771228 in words is "one hundred forty-four million, seven hundred seventy-one thousand, two hundred twenty-eight".