402321224 has 16 divisors (see below), whose sum is σ = 778686720. Its totient is φ = 194671440.

The previous prime is 402321223. The next prime is 402321247. The reversal of 402321224 is 422123204.

It is a junction number, because it is equal to n+sod(n) for n = 402321196 and 402321205.

It is not an unprimeable number, because it can be changed into a prime (402321223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 810884 + ... + 811379.

It is an arithmetic number, because the mean of its divisors is an integer number (48667920).

Almost surely, 2^402321224 is an apocalyptic number.

It is an amenable number.

402321224 is a deficient number, since it is larger than the sum of its proper divisors (376365496).

402321224 is a wasteful number, since it uses less digits than its factorization.

402321224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1622300 (or 1622296 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 402321224 is about 20057.9466546304. The cubic root of 402321224 is about 738.2287953789.

Adding to 402321224 its reverse (422123204), we get a palindrome (824444428).

The spelling of 402321224 in words is "four hundred two million, three hundred twenty-one thousand, two hundred twenty-four".