144644520 has 64 divisors (see below), whose sum is σ = 437814720. Its totient is φ = 38226944.

The previous prime is 144644519. The next prime is 144644527. The reversal of 144644520 is 25446441.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (144644527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8227 + ... + 18893.

It is an arithmetic number, because the mean of its divisors is an integer number (6840855).

Almost surely, 2^144644520 is an apocalyptic number.

144644520 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 144644520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (218907360).

144644520 is an abundant number, since it is smaller than the sum of its proper divisors (293170200).

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

144644520 is a wasteful number, since it uses less digits than its factorization.

144644520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10794 (or 10790 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 30.

The square root of 144644520 is about 12026.8250174350. The cubic root of 144644520 is about 524.9291151462.

The spelling of 144644520 in words is "one hundred forty-four million, six hundred forty-four thousand, five hundred twenty".