144322857 has 16 divisors (see below), whose sum is σ = 244356480. Its totient is φ = 82470096.

The previous prime is 144322837. The next prime is 144322873. The reversal of 144322857 is 758223441.

It is a happy number.

It is not a de Polignac number, because 144322857 - 2⁶ = 144322793 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (144322837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 381618 + ... + 381995.

It is an arithmetic number, because the mean of its divisors is an integer number (15272280).

Almost surely, 2^144322857 is an apocalyptic number.

It is an amenable number.

144322857 is a deficient number, since it is larger than the sum of its proper divisors (100033623).

144322857 is an equidigital number, since it uses as much as digits as its factorization.

144322857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763629 (or 763623 counting only the distinct ones).

The product of its digits is 53760, while the sum is 36.

The square root of 144322857 is about 12013.4448431747. Note that the first 3 decimals coincide. The cubic root of 144322857 is about 524.5397108492.

The spelling of 144322857 in words is "one hundred forty-four million, three hundred twenty-two thousand, eight hundred fifty-seven".