811872146 has 8 divisors (see below), whose sum is σ = 1220876940. Its totient is φ = 404913168.

The previous prime is 811872133. The next prime is 811872157. The reversal of 811872146 is 641278118.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 807184921 + 4687225 = 28411^2 + 2165^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 510461 + ... + 512048.

Almost surely, 2^811872146 is an apocalyptic number.

811872146 is a deficient number, since it is larger than the sum of its proper divisors (409004794).

811872146 is a wasteful number, since it uses less digits than its factorization.

811872146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1022908.

The product of its digits is 21504, while the sum is 38.

The square root of 811872146 is about 28493.3702113316. The cubic root of 811872146 is about 932.8873711578.

The spelling of 811872146 in words is "eight hundred eleven million, eight hundred seventy-two thousand, one hundred forty-six".