144400645 has 16 divisors (see below), whose sum is σ = 175348800. Its totient is φ = 114150400.

The previous prime is 144400639. The next prime is 144400649. The reversal of 144400645 is 546004441.

It is not a de Polignac number, because 144400645 - 2⁷ = 144400517 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144400649) by changing a digit.

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, 293850 + ... + 294340.

It is an arithmetic number, because the mean of its divisors is an integer number (10959300).

Almost surely, 2^144400645 is an apocalyptic number.

It is an amenable number.

144400645 is a deficient number, since it is larger than the sum of its proper divisors (30948155).

144400645 is a wasteful number, since it uses less digits than its factorization.

144400645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1076.

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 144400645 is about 12016.6819463611. The cubic root of 144400645 is about 524.6339337772.

The spelling of 144400645 in words is "one hundred forty-four million, four hundred thousand, six hundred forty-five".