144643400 has 144 divisors (see below), whose sum is σ = 380965200. Its totient is φ = 51004800.

The previous prime is 144643381. The next prime is 144643417. The reversal of 144643400 is 4346441.

It is a self number, because there is not a number n which added to its sum of digits gives 144643400.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1040531 + ... + 1040669.

Almost surely, 2^144643400 is an apocalyptic number.

144643400 is a gapful number since it is divisible by the number (10) 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 144643400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (190482600).

144643400 is an abundant number, since it is smaller than the sum of its proper divisors (236321800).

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

144643400 is a wasteful number, since it uses less digits than its factorization.

144643400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220 (or 200 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 144643400 is about 12026.7784547650. The cubic root of 144643400 is about 524.9277602795.

Adding to 144643400 its reverse (4346441), we get a palindrome (148989841).

The spelling of 144643400 in words is "one hundred forty-four million, six hundred forty-three thousand, four hundred".