402312224 has 12 divisors (see below), whose sum is σ = 792052254. Its totient is φ = 201156096.

The previous prime is 402312221. The next prime is 402312233. The reversal of 402312224 is 422213204.

It can be written as a sum of positive squares in only one way, i.e., 213744400 + 188567824 = 14620^2 + 13732^2 .

It is a junction number, because it is equal to n+sod(n) for n = 402312196 and 402312205.

It is not an unprimeable number, because it can be changed into a prime (402312221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6286097 + ... + 6286160.

Almost surely, 2^402312224 is an apocalyptic number.

It is an amenable number.

402312224 is a deficient number, since it is larger than the sum of its proper divisors (389740030).

402312224 is a wasteful number, since it uses less digits than its factorization.

402312224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12572267 (or 12572259 counting only the distinct ones).

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

The square root of 402312224 is about 20057.7223033923. The cubic root of 402312224 is about 738.2232905664.

Adding to 402312224 its reverse (422213204), we get a palindrome (824525428).

The spelling of 402312224 in words is "four hundred two million, three hundred twelve thousand, two hundred twenty-four".