144639404 has 24 divisors (see below), whose sum is σ = 311531808. Its totient is φ = 57219840.

The previous prime is 144639379. The next prime is 144639413. The reversal of 144639404 is 404936441.

It is an unprimeable number.

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, 198317 + ... + 199044.

It is an arithmetic number, because the mean of its divisors is an integer number (12980492).

Almost surely, 2^144639404 is an apocalyptic number.

144639404 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

144639404 is an abundant number, since it is smaller than the sum of its proper divisors (166892404).

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

144639404 is a wasteful number, since it uses less digits than its factorization.

144639404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397385 (or 397383 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 144639404 is about 12026.6123243414. The cubic root of 144639404 is about 524.9229262517.

The spelling of 144639404 in words is "one hundred forty-four million, six hundred thirty-nine thousand, four hundred four".