144594640 has 40 divisors (see below), whose sum is σ = 337978368. Its totient is φ = 57528960.

The previous prime is 144594623. The next prime is 144594647. The reversal of 144594640 is 46495441.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 144594640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144594647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10549 + ... + 20011.

Almost surely, 2^144594640 is an apocalyptic number.

144594640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

144594640 is an abundant number, since it is smaller than the sum of its proper divisors (193383728).

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

144594640 is a wasteful number, since it uses less digits than its factorization.

144594640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9667 (or 9661 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 144594640 is about 12024.7511408761. The cubic root of 144594640 is about 524.8687684088.

The spelling of 144594640 in words is "one hundred forty-four million, five hundred ninety-four thousand, six hundred forty".