144003640 has 64 divisors (see below), whose sum is σ = 354987360. Its totient is φ = 52139520.

The previous prime is 144003637. The next prime is 144003683. The reversal of 144003640 is 46300441.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 128362 + ... + 129478.

Almost surely, 2^144003640 is an apocalyptic number.

144003640 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 144003640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177493680).

144003640 is an abundant number, since it is smaller than the sum of its proper divisors (210983720).

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

144003640 is a wasteful number, since it uses less digits than its factorization.

144003640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1432 (or 1428 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 144003640 is about 12000.1516657082. The cubic root of 144003640 is about 524.1526952391.

The spelling of 144003640 in words is "one hundred forty-four million, three thousand, six hundred forty".