144236840 has 96 divisors (see below), whose sum is σ = 377916840. Its totient is φ = 49336320.

The previous prime is 144236839. The next prime is 144236867. The reversal of 144236840 is 48632441.

144236840 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 94984516 + 49252324 = 9746^2 + 7018^2 .

It is a junction number, because it is equal to n+sod(n) for n = 144236797 and 144236806.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81404 + ... + 83156.

Almost surely, 2^144236840 is an apocalyptic number.

144236840 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 144236840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188958420).

144236840 is an abundant number, since it is smaller than the sum of its proper divisors (233680000).

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

144236840 is a wasteful number, since it uses less digits than its factorization.

144236840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1803 (or 1788 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 144236840 is about 12009.8642790000. The cubic root of 144236840 is about 524.4354808841.

The spelling of 144236840 in words is "one hundred forty-four million, two hundred thirty-six thousand, eight hundred forty".