144345640 has 64 divisors (see below), whose sum is σ = 348364800. Its totient is φ = 53634048.

The previous prime is 144345637. The next prime is 144345647. The reversal of 144345640 is 46543441.

It is not an unprimeable number, because it can be changed into a prime (144345647) 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, 52377 + ... + 55063.

It is an arithmetic number, because the mean of its divisors is an integer number (5443200).

Almost surely, 2^144345640 is an apocalyptic number.

144345640 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 144345640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174182400).

144345640 is an abundant number, since it is smaller than the sum of its proper divisors (204019160).

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

144345640 is a wasteful number, since it uses less digits than its factorization.

144345640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2794 (or 2790 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 144345640 is about 12014.3930350226. The cubic root of 144345640 is about 524.5673109113.

The spelling of 144345640 in words is "one hundred forty-four million, three hundred forty-five thousand, six hundred forty".