144246440 has 64 divisors (see below), whose sum is σ = 354533760. Its totient is φ = 52496640.

The previous prime is 144246433. The next prime is 144246449. The reversal of 144246440 is 44642441.

It is not an unprimeable number, because it can be changed into a prime (144246449) 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, 34967 + ... + 38873.

It is an arithmetic number, because the mean of its divisors is an integer number (5539590).

Almost surely, 2^144246440 is an apocalyptic number.

144246440 is a gapful number since it is divisible by the number (10) 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 144246440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177266880).

144246440 is an abundant number, since it is smaller than the sum of its proper divisors (210287320).

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

144246440 is a wasteful number, since it uses less digits than its factorization.

144246440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4002 (or 3998 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 29.

The square root of 144246440 is about 12010.2639438107. The cubic root of 144246440 is about 524.4471156114.

Adding to 144246440 its reverse (44642441), we get a palindrome (188888881).

The spelling of 144246440 in words is "one hundred forty-four million, two hundred forty-six thousand, four hundred forty".