144921438 has 24 divisors (see below), whose sum is σ = 321300408. Its totient is φ = 47183472.

The previous prime is 144921433. The next prime is 144921463. The reversal of 144921438 is 834129441.

It is a happy number.

144921438 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144921433) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 92845 + ... + 94392.

It is an arithmetic number, because the mean of its divisors is an integer number (13387517).

Almost surely, 2^144921438 is an apocalyptic number.

144921438 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

144921438 is an abundant number, since it is smaller than the sum of its proper divisors (176378970).

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

144921438 is a wasteful number, since it uses less digits than its factorization.

144921438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187288 (or 187285 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 144921438 is about 12038.3320273201. The cubic root of 144921438 is about 525.2638891037.

The spelling of 144921438 in words is "one hundred forty-four million, nine hundred twenty-one thousand, four hundred thirty-eight".