813792290 has 16 divisors (see below), whose sum is σ = 1472922360. Its totient is φ = 323717760.

The previous prime is 813792281. The next prime is 813792293. The reversal of 813792290 is 92297318.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 420127009 + 393665281 = 20497^2 + 19841^2 .

It is not an unprimeable number, because it can be changed into a prime (813792293) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 222995 + ... + 226614.

Almost surely, 2^813792290 is an apocalyptic number.

813792290 is a deficient number, since it is larger than the sum of its proper divisors (659130070).

813792290 is a wasteful number, since it uses less digits than its factorization.

813792290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449797.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 813792290 is about 28527.0448872644. The cubic root of 813792290 is about 933.6222437511.

The spelling of 813792290 in words is "eight hundred thirteen million, seven hundred ninety-two thousand, two hundred ninety".