813800002 has 16 divisors (see below), whose sum is σ = 1231131672. Its totient is φ = 403430400.

The previous prime is 813799997. The next prime is 813800011. The reversal of 813800002 is 200008318.

It can be written as a sum of positive squares in 4 ways, for example, as 559748281 + 254051721 = 23659^2 + 15939^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 327838 + ... + 330310.

Almost surely, 2^813800002 is an apocalyptic number.

813800002 is a deficient number, since it is larger than the sum of its proper divisors (417331670).

813800002 is a wasteful number, since it uses less digits than its factorization.

813800002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3813.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 813800002 is about 28527.1800569212. The cubic root of 813800002 is about 933.6251929360.

It can be divided in two parts, 81 and 3800002, that added together give a palindrome (3800083).

The spelling of 813800002 in words is "eight hundred thirteen million, eight hundred thousand, two".