402630433 has 4 divisors (see below), whose sum is σ = 420136128. Its totient is φ = 385124740.

The previous prime is 402630419. The next prime is 402630443. The reversal of 402630433 is 334036204.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402630433 is a prime.

It is a super-2 number, since 2×402630433² = 324222531155534978, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 402630398 and 402630407.

It is not an unprimeable number, because it can be changed into a prime (402630443) 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, 8752813 + ... + 8752858.

It is an arithmetic number, because the mean of its divisors is an integer number (105034032).

Almost surely, 2^402630433 is an apocalyptic number.

It is an amenable number.

402630433 is a deficient number, since it is larger than the sum of its proper divisors (17505695).

402630433 is a wasteful number, since it uses less digits than its factorization.

402630433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17505694.

The product of its (nonzero) digits is 5184, while the sum is 25.

The square root of 402630433 is about 20065.6530668703. The cubic root of 402630433 is about 738.4178719341.

Adding to 402630433 its reverse (334036204), we get a palindrome (736666637).

The spelling of 402630433 in words is "four hundred two million, six hundred thirty thousand, four hundred thirty-three".