809136 has 40 divisors (see below), whose sum is σ = 2323760. Its totient is φ = 269568.

The previous prime is 809101. The next prime is 809141. The reversal of 809136 is 631908.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 809136.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 505 + ... + 1368.

It is an arithmetic number, because the mean of its divisors is an integer number (58094).

2⁸⁰⁹¹³⁶ is an apocalyptic number.

It is an amenable number.

809136 is an abundant number, since it is smaller than the sum of its proper divisors (1514624).

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

809136 is a wasteful number, since it uses less digits than its factorization.

809136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1890 (or 1878 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 809136 is about 899.5198719317. The cubic root of 809136 is about 93.1838195738.

It can be divided in two parts, 80 and 9136, that added together give a square (9216 = 96²).

The spelling of 809136 in words is "eight hundred nine thousand, one hundred thirty-six".