402638473 has 4 divisors (see below), whose sum is σ = 403568788. Its totient is φ = 401708160.

The previous prime is 402638449. The next prime is 402638531. The reversal of 402638473 is 374836204.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 231891984 + 170746489 = 15228^2 + 13067^2 .

It is a cyclic number.

It is not a de Polignac number, because 402638473 - 2⁵ = 402638441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402638413) 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, 464508 + ... + 465373.

It is an arithmetic number, because the mean of its divisors is an integer number (100892197).

Almost surely, 2^402638473 is an apocalyptic number.

It is an amenable number.

402638473 is a deficient number, since it is larger than the sum of its proper divisors (930315).

402638473 is an equidigital number, since it uses as much as digits as its factorization.

402638473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 930314.

The product of its (nonzero) digits is 96768, while the sum is 37.

The square root of 402638473 is about 20065.8534082157. The cubic root of 402638473 is about 738.4227869792.

The spelling of 402638473 in words is "four hundred two million, six hundred thirty-eight thousand, four hundred seventy-three".