144639432 has 128 divisors (see below), whose sum is σ = 465235200. Its totient is φ = 41290560.

The previous prime is 144639421. The next prime is 144639437. The reversal of 144639432 is 234936441.

It is a happy number.

144639432 is a `hidden beast` number, since 14 + 4 + 639 + 4 + 3 + 2 = 666.

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

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (144639437) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 121882 + ... + 123062.

It is an arithmetic number, because the mean of its divisors is an integer number (3634650).

Almost surely, 2^144639432 is an apocalyptic number.

144639432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 144639432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (232617600).

144639432 is an abundant number, since it is smaller than the sum of its proper divisors (320595768).

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

144639432 is an equidigital number, since it uses as much as digits as its factorization.

144639432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1215 (or 1193 counting only the distinct ones).

The product of its digits is 62208, while the sum is 36.

The square root of 144639432 is about 12026.6134884264. The cubic root of 144639432 is about 524.9229601241.

The spelling of 144639432 in words is "one hundred forty-four million, six hundred thirty-nine thousand, four hundred thirty-two".