144705220 has 48 divisors (see below), whose sum is σ = 334103616. Its totient is φ = 52208000.

The previous prime is 144705203. The next prime is 144705247. The reversal of 144705220 is 22507441.

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, 26310 + ... + 31330.

It is an arithmetic number, because the mean of its divisors is an integer number (6960492).

Almost surely, 2^144705220 is an apocalyptic number.

144705220 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 144705220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (167051808).

144705220 is an abundant number, since it is smaller than the sum of its proper divisors (189398396).

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

144705220 is a wasteful number, since it uses less digits than its factorization.

144705220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5172 (or 5170 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 144705220 is about 12029.3482782734. The cubic root of 144705220 is about 525.0025336234.

The spelling of 144705220 in words is "one hundred forty-four million, seven hundred five thousand, two hundred twenty".