144401885 has 8 divisors (see below), whose sum is σ = 173357496. Its totient is φ = 115471360.

The previous prime is 144401867. The next prime is 144401899. The reversal of 144401885 is 588104441.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 17749369 + 126652516 = 4213^2 + 11254^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 144401885 - 2²⁴ = 127624669 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10457 + ... + 19953.

It is an arithmetic number, because the mean of its divisors is an integer number (21669687).

Almost surely, 2^144401885 is an apocalyptic number.

It is an amenable number.

144401885 is a deficient number, since it is larger than the sum of its proper divisors (28955611).

144401885 is an equidigital number, since it uses as much as digits as its factorization.

144401885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12543.

The product of its (nonzero) digits is 20480, while the sum is 35.

The square root of 144401885 is about 12016.7335411916. The cubic root of 144401885 is about 524.6354354884.

The spelling of 144401885 in words is "one hundred forty-four million, four hundred one thousand, eight hundred eighty-five".