144181836 has 48 divisors (see below), whose sum is σ = 380872800. Its totient is φ = 47151936.

The previous prime is 144181801. The next prime is 144181841. The reversal of 144181836 is 638181441.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 144181836.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6871 + ... + 18318.

It is an arithmetic number, because the mean of its divisors is an integer number (7934850).

Almost surely, 2^144181836 is an apocalyptic number.

It is an amenable number.

144181836 is an abundant number, since it is smaller than the sum of its proper divisors (236690964).

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

144181836 is a wasteful number, since it uses less digits than its factorization.

144181836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25255 (or 25247 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 144181836 is about 12007.5741097026. The cubic root of 144181836 is about 524.3688087894.

The spelling of 144181836 in words is "one hundred forty-four million, one hundred eighty-one thousand, eight hundred thirty-six".