809951842 has 16 divisors (see below), whose sum is σ = 1470165120. Its totient is φ = 326703168.

The previous prime is 809951819. The next prime is 809951851. The reversal of 809951842 is 248159908.

It is a junction number, because it is equal to n+sod(n) for n = 809951792 and 809951801.

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, 1701342 + ... + 1701817.

It is an arithmetic number, because the mean of its divisors is an integer number (91885320).

Almost surely, 2^809951842 is an apocalyptic number.

809951842 is a deficient number, since it is larger than the sum of its proper divisors (660213278).

809951842 is a wasteful number, since it uses less digits than its factorization.

809951842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3403185.

The product of its (nonzero) digits is 207360, while the sum is 46.

The square root of 809951842 is about 28459.6528791199. The cubic root of 809951842 is about 932.1512775801.

The spelling of 809951842 in words is "eight hundred nine million, nine hundred fifty-one thousand, eight hundred forty-two".