809626242 has 32 divisors (see below), whose sum is σ = 1639170432. Its totient is φ = 266572544.

The previous prime is 809626219. The next prime is 809626319. The reversal of 809626242 is 242626908.

It is a self number, because there is not a number n which added to its sum of digits gives 809626242.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 213043 + ... + 216809.

It is an arithmetic number, because the mean of its divisors is an integer number (51224076).

Almost surely, 2^809626242 is an apocalyptic number.

809626242 is an abundant number, since it is smaller than the sum of its proper divisors (829544190).

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

809626242 is a wasteful number, since it uses less digits than its factorization.

809626242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4202.

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 809626242 is about 28453.9319251312. The cubic root of 809626242 is about 932.0263528133.

The spelling of 809626242 in words is "eight hundred nine million, six hundred twenty-six thousand, two hundred forty-two".