144391020 has 96 divisors (see below), whose sum is σ = 418611648. Its totient is φ = 37158912.

The previous prime is 144391001. The next prime is 144391021. The reversal of 144391020 is 20193441.

It is not an unprimeable number, because it can be changed into a prime (144391021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 428292 + ... + 428628.

It is an arithmetic number, because the mean of its divisors is an integer number (4360538).

Almost surely, 2^144391020 is an apocalyptic number.

144391020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 144391020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209305824).

144391020 is an abundant number, since it is smaller than the sum of its proper divisors (274220628).

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

144391020 is a wasteful number, since it uses less digits than its factorization.

144391020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579 (or 577 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 144391020 is about 12016.2814547596. The cubic root of 144391020 is about 524.6222770568.

The spelling of 144391020 in words is "one hundred forty-four million, three hundred ninety-one thousand, twenty".