811872942 has 16 divisors (see below), whose sum is σ = 1634500992. Its totient is φ = 268831800.

The previous prime is 811872917. The next prime is 811872949. The reversal of 811872942 is 249278118.

It is a junction number, because it is equal to n+sod(n) for n = 811872894 and 811872903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811872949) 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 7 ways as a sum of consecutive naturals, for example, 447148 + ... + 448959.

It is an arithmetic number, because the mean of its divisors is an integer number (102156312).

Almost surely, 2^811872942 is an apocalyptic number.

811872942 is an abundant number, since it is smaller than the sum of its proper divisors (822628050).

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

811872942 is a wasteful number, since it uses less digits than its factorization.

811872942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 896263.

The product of its digits is 64512, while the sum is 42.

The square root of 811872942 is about 28493.3841794898. The cubic root of 811872942 is about 932.8876760408.

The spelling of 811872942 in words is "eight hundred eleven million, eight hundred seventy-two thousand, nine hundred forty-two".