811486144 has 28 divisors (see below), whose sum is σ = 1840335664. Its totient is φ = 347779584.

The previous prime is 811486139. The next prime is 811486147. The reversal of 811486144 is 441684118.

It is a tau number, because it is divible by the number of its divisors (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811486147) by changing a digit.

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, 905229 + ... + 906124.

Almost surely, 2^811486144 is an apocalyptic number.

It is an amenable number.

811486144 is an abundant number, since it is smaller than the sum of its proper divisors (1028849520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

811486144 is a wasteful number, since it uses less digits than its factorization.

811486144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1811372 (or 1811362 counting only the distinct ones).

The product of its digits is 24576, while the sum is 37.

The square root of 811486144 is about 28486.5958654241. The cubic root of 811486144 is about 932.7395016208.

The spelling of 811486144 in words is "eight hundred eleven million, four hundred eighty-six thousand, one hundred forty-four".