811928742 has 16 divisors (see below), whose sum is σ = 1643423040. Its totient is φ = 267381992.

The previous prime is 811928731. The next prime is 811928743. The reversal of 811928742 is 247829118.

It is a junction number, because it is equal to n+sod(n) for n = 811928694 and 811928703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811928743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 814692 + ... + 815687.

It is an arithmetic number, because the mean of its divisors is an integer number (102713940).

Almost surely, 2^811928742 is an apocalyptic number.

811928742 is an abundant number, since it is smaller than the sum of its proper divisors (831494298).

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

811928742 is a wasteful number, since it uses less digits than its factorization.

811928742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1630467.

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

The square root of 811928742 is about 28494.3633373339. The cubic root of 811928742 is about 932.9090479974.

The spelling of 811928742 in words is "eight hundred eleven million, nine hundred twenty-eight thousand, seven hundred forty-two".