144445140 has 288 divisors, whose sum is σ = 537788160. Its totient is φ = 32078592.

The previous prime is 144445121. The next prime is 144445153. The reversal of 144445140 is 41544441.

144445140 is a `hidden beast` number, since 144 + 4 + 4 + 514 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1402329 + ... + 1402431.

It is an arithmetic number, because the mean of its divisors is an integer number (1867320).

Almost surely, 2^144445140 is an apocalyptic number.

144445140 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 144445140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (268894080).

144445140 is an abundant number, since it is smaller than the sum of its proper divisors (393343020).

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

144445140 is a wasteful number, since it uses less digits than its factorization.

144445140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188 (or 173 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

The square root of 144445140 is about 12018.5331883720. The cubic root of 144445140 is about 524.6878143990.

Adding to 144445140 its reverse (41544441), we get a palindrome (185989581).

The spelling of 144445140 in words is "one hundred forty-four million, four hundred forty-five thousand, one hundred forty".