144138478 has 16 divisors (see below), whose sum is σ = 249737904. Its totient is φ = 61663360.

The previous prime is 144138473. The next prime is 144138481. The reversal of 144138478 is 874831441.

It is a happy number.

144138478 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 144138478.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144138473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192325 + ... + 193072.

It is an arithmetic number, because the mean of its divisors is an integer number (15608619).

Almost surely, 2^144138478 is an apocalyptic number.

144138478 is a deficient number, since it is larger than the sum of its proper divisors (105599426).

144138478 is a wasteful number, since it uses less digits than its factorization.

144138478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385427.

The product of its digits is 86016, while the sum is 40.

The square root of 144138478 is about 12005.7685301692. The cubic root of 144138478 is about 524.3162412289.

The spelling of 144138478 in words is "one hundred forty-four million, one hundred thirty-eight thousand, four hundred seventy-eight".