402424424 has 8 divisors (see below), whose sum is σ = 754545810. Its totient is φ = 201212208.

The previous prime is 402424417. The next prime is 402424457. The reversal of 402424424 is 424424204.

It can be written as a sum of positive squares in only one way, i.e., 375196900 + 27227524 = 19370^2 + 5218^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 402424393 and 402424402.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25151519 + ... + 25151534.

Almost surely, 2^402424424 is an apocalyptic number.

It is an amenable number.

402424424 is a deficient number, since it is larger than the sum of its proper divisors (352121386).

402424424 is a wasteful number, since it uses less digits than its factorization.

402424424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50303059 (or 50303055 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 26.

The square root of 402424424 is about 20060.5190361566. The cubic root of 402424424 is about 738.2919113618.

Adding to 402424424 its reverse (424424204), we get a palindrome (826848628).

The spelling of 402424424 in words is "four hundred two million, four hundred twenty-four thousand, four hundred twenty-four".