811012492 has 72 divisors (see below), whose sum is σ = 1572676560. Its totient is φ = 365420160.

The previous prime is 811012487. The next prime is 811012493. The reversal of 811012492 is 294210118.

It is a self number, because there is not a number n which added to its sum of digits gives 811012492.

It is not an unprimeable number, because it can be changed into a prime (811012493) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4480642 + ... + 4480822.

It is an arithmetic number, because the mean of its divisors is an integer number (21842730).

Almost surely, 2^811012492 is an apocalyptic number.

It is an amenable number.

811012492 is a deficient number, since it is larger than the sum of its proper divisors (761664068).

811012492 is a wasteful number, since it uses less digits than its factorization.

811012492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359 (or 338 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 811012492 is about 28478.2810576762. The cubic root of 811012492 is about 932.5579910604.

It can be divided in two parts, 8110 and 12492, that added together give a palindrome (20602).

The spelling of 811012492 in words is "eight hundred eleven million, twelve thousand, four hundred ninety-two".