144863720 has 16 divisors (see below), whose sum is σ = 325943460. Its totient is φ = 57945472.

The previous prime is 144863717. The next prime is 144863723. The reversal of 144863720 is 27368441.

It is an interprime number because it is at equal distance from previous prime (144863717) and next prime (144863723).

It can be written as a sum of positive squares in 2 ways, for example, as 142898116 + 1965604 = 11954^2 + 1402^2 .

It is not an unprimeable number, because it can be changed into a prime (144863723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1810757 + ... + 1810836.

Almost surely, 2^144863720 is an apocalyptic number.

144863720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

144863720 is an abundant number, since it is smaller than the sum of its proper divisors (181079740).

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

144863720 is a wasteful number, since it uses less digits than its factorization.

144863720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3621604 (or 3621600 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 144863720 is about 12035.9345295660. The cubic root of 144863720 is about 525.1941473933.

The spelling of 144863720 in words is "one hundred forty-four million, eight hundred sixty-three thousand, seven hundred twenty".