813161472 has 88 divisors (see below), whose sum is σ = 2178925056. Its totient is φ = 269611008.

The previous prime is 813161467. The next prime is 813161507. The reversal of 813161472 is 274161318.

It is a super-2 number, since 2×813161472² = 1322463159090413568, which contains 22 as substring.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 684463 + ... + 685649.

It is an arithmetic number, because the mean of its divisors is an integer number (24760512).

Almost surely, 2^813161472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 813161472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1089462528).

813161472 is an abundant number, since it is smaller than the sum of its proper divisors (1365763584).

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

813161472 is a wasteful number, since it uses less digits than its factorization.

813161472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1433 (or 1415 counting only the distinct ones).

The product of its digits is 8064, while the sum is 33.

The square root of 813161472 is about 28515.9862533281. The cubic root of 813161472 is about 933.3809463239.

The spelling of 813161472 in words is "eight hundred thirteen million, one hundred sixty-one thousand, four hundred seventy-two".