144619881 has 16 divisors (see below), whose sum is σ = 224532864. Its totient is φ = 81080064.

The previous prime is 144619877. The next prime is 144619889. The reversal of 144619881 is 188916441.

It is a happy number.

It is not a de Polignac number, because 144619881 - 2² = 144619877 is a prime.

It is a super-2 number, since 2×144619881² = 41829819960908322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (144619889) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63856 + ... + 66081.

It is an arithmetic number, because the mean of its divisors is an integer number (14033304).

Almost surely, 2^144619881 is an apocalyptic number.

It is an amenable number.

144619881 is a deficient number, since it is larger than the sum of its proper divisors (79912983).

144619881 is a wasteful number, since it uses less digits than its factorization.

144619881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130000.

The product of its digits is 55296, while the sum is 42.

The square root of 144619881 is about 12025.8006386269. The cubic root of 144619881 is about 524.8993076731.

It can be divided in two parts, 14461 and 9881, that added together give a palindrome (24342).

The spelling of 144619881 in words is "one hundred forty-four million, six hundred nineteen thousand, eight hundred eighty-one".