144431380 has 12 divisors (see below), whose sum is σ = 303305940. Its totient is φ = 57772544.

The previous prime is 144431377. The next prime is 144431381. The reversal of 144431380 is 83134441.

It can be written as a sum of positive squares in 2 ways, for example, as 113806224 + 30625156 = 10668^2 + 5534^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144431381) 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 3 ways as a sum of consecutive naturals, for example, 3610765 + ... + 3610804.

It is an arithmetic number, because the mean of its divisors is an integer number (25275495).

Almost surely, 2^144431380 is an apocalyptic number.

144431380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

144431380 is an abundant number, since it is smaller than the sum of its proper divisors (158874560).

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

144431380 is a wasteful number, since it uses less digits than its factorization.

144431380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7221578 (or 7221576 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 144431380 is about 12017.9607255141. The cubic root of 144431380 is about 524.6711530940.

The spelling of 144431380 in words is "one hundred forty-four million, four hundred thirty-one thousand, three hundred eighty".