402144443444 has 12 divisors (see below), whose sum is σ = 715680789600. Its totient is φ = 197664217848.

The previous prime is 402144443443. The next prime is 402144443509. The reversal of 402144443444 is 444344441204.

It is a super-2 number, since 2×402144443444² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 402144443398 and 402144443407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402144443443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 852000704 + ... + 852001175.

It is an arithmetic number, because the mean of its divisors is an integer number (59640065800).

Almost surely, 2^402144443444 is an apocalyptic number.

It is an amenable number.

402144443444 is a deficient number, since it is larger than the sum of its proper divisors (313536346156).

402144443444 is a wasteful number, since it uses less digits than its factorization.

402144443444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1704001942 (or 1704001940 counting only the distinct ones).

The product of its (nonzero) digits is 393216, while the sum is 38.

Adding to 402144443444 its reverse (444344441204), we get a palindrome (846488884648).

The spelling of 402144443444 in words is "four hundred two billion, one hundred forty-four million, four hundred forty-three thousand, four hundred forty-four".