144442881 has 24 divisors (see below), whose sum is σ = 235460160. Its totient is φ = 84520800.

The previous prime is 144442873. The next prime is 144442901. The reversal of 144442881 is 188244441.

It is not a de Polignac number, because 144442881 - 2³ = 144442873 is a prime.

It is a super-2 number, since 2×144442881² = 41727491743160322, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (144442801) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22285 + ... + 28026.

It is an arithmetic number, because the mean of its divisors is an integer number (9810840).

Almost surely, 2^144442881 is an apocalyptic number.

144442881 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

144442881 is a deficient number, since it is larger than the sum of its proper divisors (91017279).

144442881 is a wasteful number, since it uses less digits than its factorization.

144442881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50357 (or 50354 counting only the distinct ones).

The product of its digits is 32768, while the sum is 36.

The square root of 144442881 is about 12018.4392081501. The cubic root of 144442881 is about 524.6850791600.

The spelling of 144442881 in words is "one hundred forty-four million, four hundred forty-two thousand, eight hundred eighty-one".