809280140 has 24 divisors (see below), whose sum is σ = 1740940992. Its totient is φ = 315816320.

The previous prime is 809280127. The next prime is 809280191. The reversal of 809280140 is 41082908.

It is a happy number.

It is a super-3 number, since 3×809280140³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 809280097 and 809280106.

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, 492644 + ... + 494283.

It is an arithmetic number, because the mean of its divisors is an integer number (72539208).

Almost surely, 2^809280140 is an apocalyptic number.

It is an amenable number.

809280140 is an abundant number, since it is smaller than the sum of its proper divisors (931660852).

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

809280140 is a wasteful number, since it uses less digits than its factorization.

809280140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986977 (or 986975 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 809280140 is about 28447.8494793543. The cubic root of 809280140 is about 931.8935252013.

The spelling of 809280140 in words is "eight hundred nine million, two hundred eighty thousand, one hundred forty".