809699268 has 192 divisors, whose sum is σ = 2373009408. Its totient is φ = 209848320.

The previous prime is 809699263. The next prime is 809699287. The reversal of 809699268 is 862996908.

It is a super-2 number, since 2×809699268² = 1311225809199471648, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (809699263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3359628 + ... + 3359868.

It is an arithmetic number, because the mean of its divisors is an integer number (12359424).

Almost surely, 2^809699268 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 809699268, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1186504704).

809699268 is an abundant number, since it is smaller than the sum of its proper divisors (1563310140).

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

809699268 is a wasteful number, since it uses less digits than its factorization.

809699268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362 (or 360 counting only the distinct ones).

The product of its (nonzero) digits is 3359232, while the sum is 57.

The square root of 809699268 is about 28455.2151283381. The cubic root of 809699268 is about 932.0543740189.

The spelling of 809699268 in words is "eight hundred nine million, six hundred ninety-nine thousand, two hundred sixty-eight".