144997812 has 72 divisors (see below), whose sum is σ = 378148680. Its totient is φ = 46817280.

The previous prime is 144997807. The next prime is 144997843. The reversal of 144997812 is 218799441.

It is a happy number.

144997812 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3006756 + 141991056 = 1734^2 + 11916^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 284614 + ... + 285122.

It is an arithmetic number, because the mean of its divisors is an integer number (5252065).

Almost surely, 2^144997812 is an apocalyptic number.

144997812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 144997812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (189074340).

144997812 is an abundant number, since it is smaller than the sum of its proper divisors (233150868).

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

144997812 is a wasteful number, since it uses less digits than its factorization.

144997812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753 (or 748 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 144997812 is about 12041.5037266946. The cubic root of 144997812 is about 525.3561447417.

The spelling of 144997812 in words is "one hundred forty-four million, nine hundred ninety-seven thousand, eight hundred twelve".