144490440 has 128 divisors (see below), whose sum is σ = 460800000. Its totient is φ = 36142848.

The previous prime is 144490427. The next prime is 144490483. The reversal of 144490440 is 44094441.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 144490398 and 144490407.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 289311 + ... + 289809.

It is an arithmetic number, because the mean of its divisors is an integer number (3600000).

Almost surely, 2^144490440 is an apocalyptic number.

144490440 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 144490440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230400000).

144490440 is an abundant number, since it is smaller than the sum of its proper divisors (316309560).

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

144490440 is a wasteful number, since it uses less digits than its factorization.

144490440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659 (or 655 counting only the distinct ones).

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

The square root of 144490440 is about 12020.4176300160. The cubic root of 144490440 is about 524.7426584589.

The spelling of 144490440 in words is "one hundred forty-four million, four hundred ninety thousand, four hundred forty".