144442290 has 16 divisors (see below), whose sum is σ = 346661568. Its totient is φ = 38517936.

The previous prime is 144442273. The next prime is 144442297. The reversal of 144442290 is 92244441.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 4814743 = 144442290 / (1 + 4 + 4 + 4 + 4 + 2 + 2 + 9 + 0).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (144442297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2407342 + ... + 2407401.

It is an arithmetic number, because the mean of its divisors is an integer number (21666348).

Almost surely, 2^144442290 is an apocalyptic number.

144442290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

144442290 is an abundant number, since it is smaller than the sum of its proper divisors (202219278).

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

144442290 is a wasteful number, since it uses less digits than its factorization.

144442290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4814753.

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 144442290 is about 12018.4146209057. The cubic root of 144442290 is about 524.6843635615.

It can be divided in two parts, 1444 and 42290, that added together give a palindrome (43734).

The spelling of 144442290 in words is "one hundred forty-four million, four hundred forty-two thousand, two hundred ninety".