144665990 has 32 divisors (see below), whose sum is σ = 300248640. Its totient is φ = 49158144.

The previous prime is 144665987. The next prime is 144665993. The reversal of 144665990 is 99566441.

144665990 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (144665987) and next prime (144665993).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144665993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1235 + ... + 17054.

It is an arithmetic number, because the mean of its divisors is an integer number (9382770).

Almost surely, 2^144665990 is an apocalyptic number.

144665990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

144665990 is an abundant number, since it is smaller than the sum of its proper divisors (155582650).

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

144665990 is a wasteful number, since it uses less digits than its factorization.

144665990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18416.

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 144665990 is about 12027.7175723410. The cubic root of 144665990 is about 524.9550861048.

The spelling of 144665990 in words is "one hundred forty-four million, six hundred sixty-five thousand, nine hundred ninety".