144863640 has 80 divisors (see below), whose sum is σ = 486913680. Its totient is φ = 38629440.

The previous prime is 144863639. The next prime is 144863669. The reversal of 144863640 is 46368441.

144863640 is a `hidden beast` number, since 1 + 4 + 4 + 8 + 6 + 3 + 640 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 144863595 and 144863604.

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 19 ways as a sum of consecutive naturals, for example, 19116 + ... + 25595.

It is an arithmetic number, because the mean of its divisors is an integer number (6086421).

Almost surely, 2^144863640 is an apocalyptic number.

144863640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

144863640 is an abundant number, since it is smaller than the sum of its proper divisors (342050040).

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

144863640 is a wasteful number, since it uses less digits than its factorization.

144863640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44734 (or 44721 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The square root of 144863640 is about 12035.9312061843. The cubic root of 144863640 is about 525.1940507150.

The spelling of 144863640 in words is "one hundred forty-four million, eight hundred sixty-three thousand, six hundred forty".