423021535444 has 24 divisors (see below), whose sum is σ = 784991912040. Its totient is φ = 198774890496.

The previous prime is 423021535399. The next prime is 423021535457. The reversal of 423021535444 is 444535120324.

It can be written as a sum of positive squares in 4 ways, for example, as 134263616400 + 288757919044 = 366420^2 + 537362^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4548429 + ... + 4640500.

It is an arithmetic number, because the mean of its divisors is an integer number (32707996335).

Almost surely, 2^423021535444 is an apocalyptic number.

It is an amenable number.

423021535444 is a deficient number, since it is larger than the sum of its proper divisors (361970376596).

423021535444 is a wasteful number, since it uses less digits than its factorization.

423021535444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9189627 (or 9189625 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 37.

Adding to 423021535444 its reverse (444535120324), we get a palindrome (867556655768).

The spelling of 423021535444 in words is "four hundred twenty-three billion, twenty-one million, five hundred thirty-five thousand, four hundred forty-four".