144917478 has 16 divisors (see below), whose sum is σ = 322038960. Its totient is φ = 48305808.

The previous prime is 144917477. The next prime is 144917489. The reversal of 144917478 is 874719441.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144917477) 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, 1341775 + ... + 1341882.

It is an arithmetic number, because the mean of its divisors is an integer number (20127435).

Almost surely, 2^144917478 is an apocalyptic number.

144917478 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

144917478 is an abundant number, since it is smaller than the sum of its proper divisors (177121482).

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

144917478 is a wasteful number, since it uses less digits than its factorization.

144917478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2683668 (or 2683662 counting only the distinct ones).

The product of its digits is 225792, while the sum is 45.

The square root of 144917478 is about 12038.1675515836. The cubic root of 144917478 is about 525.2591047553.

The spelling of 144917478 in words is "one hundred forty-four million, nine hundred seventeen thousand, four hundred seventy-eight".