144999720 has 80 divisors (see below), whose sum is σ = 487371060. Its totient is φ = 38665728.

The previous prime is 144999719. The next prime is 144999721. The reversal of 144999720 is 27999441.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (144999719) and next prime (144999721).

It can be written as a sum of positive squares in 2 ways, for example, as 141562404 + 3437316 = 11898^2 + 1854^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (144999721) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 19137 + ... + 25616.

Almost surely, 2^144999720 is an apocalyptic number.

144999720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

144999720 is an abundant number, since it is smaller than the sum of its proper divisors (342371340).

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

144999720 is a wasteful number, since it uses less digits than its factorization.

144999720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44776 (or 44763 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 144999720 is about 12041.5829524195. The cubic root of 144999720 is about 525.3584490871.

The spelling of 144999720 in words is "one hundred forty-four million, nine hundred ninety-nine thousand, seven hundred twenty".