808100402 has 6 divisors (see below), whose sum is σ = 1212210909. Its totient is φ = 404030100.

The previous prime is 808100369. The next prime is 808100411. The reversal of 808100402 is 204001808.

It can be written as a sum of positive squares in 2 ways, for example, as 785736961 + 22363441 = 28031^2 + 4729^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=20101.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 30152 + ... + 50252.

Almost surely, 2^808100402 is an apocalyptic number.

808100402 is a deficient number, since it is larger than the sum of its proper divisors (404110507).

808100402 is an frugal number, since it uses more digits than its factorization.

808100402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40204 (or 20103 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 808100402 is about 28427.1068172616. The cubic root of 808100402 is about 931.4404785990.

Multiplying 808100402 by its product of nonzero digits (512), we get a square (413747405824 = 643232²).

The spelling of 808100402 in words is "eight hundred eight million, one hundred thousand, four hundred two".