144720436 has 24 divisors (see below), whose sum is σ = 293521536. Its totient is φ = 61148640.

The previous prime is 144720427. The next prime is 144720449. The reversal of 144720436 is 634027441.

It is a junction number, because it is equal to n+sod(n) for n = 144720398 and 144720407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34411 + ... + 38386.

It is an arithmetic number, because the mean of its divisors is an integer number (12230064).

Almost surely, 2^144720436 is an apocalyptic number.

It is an amenable number.

144720436 is an abundant number, since it is smaller than the sum of its proper divisors (148801100).

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

144720436 is a wasteful number, since it uses less digits than its factorization.

144720436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72879 (or 72877 counting only the distinct ones).

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

The square root of 144720436 is about 12029.9807148640. The cubic root of 144720436 is about 525.0209346149.

Adding to 144720436 its reverse (634027441), we get a palindrome (778747877).

The spelling of 144720436 in words is "one hundred forty-four million, seven hundred twenty thousand, four hundred thirty-six".