144720346 has 4 divisors (see below), whose sum is σ = 217080522. Its totient is φ = 72360172.

The previous prime is 144720311. The next prime is 144720349. The reversal of 144720346 is 643027441.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 138415225 + 6305121 = 11765^2 + 2511^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (144720349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36180085 + ... + 36180088.

Almost surely, 2^144720346 is an apocalyptic number.

144720346 is a deficient number, since it is larger than the sum of its proper divisors (72360176).

144720346 is an equidigital number, since it uses as much as digits as its factorization.

144720346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72360175.

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 144720346 is about 12029.9769742091. The cubic root of 144720346 is about 525.0208257801.

Adding to 144720346 its reverse (643027441), we get a palindrome (787747787).

The spelling of 144720346 in words is "one hundred forty-four million, seven hundred twenty thousand, three hundred forty-six".