804913642 has 16 divisors (see below), whose sum is σ = 1313123112. Its totient is φ = 367819200.

The previous prime is 804913639. The next prime is 804913657. The reversal of 804913642 is 246319408.

It is a Cunningham number, because it is equal to 28371²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 804913641 + 1 = 28371^2 + 1^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150633 + ... + 155884.

Almost surely, 2^804913642 is an apocalyptic number.

804913642 is a deficient number, since it is larger than the sum of its proper divisors (508209470).

804913642 is a wasteful number, since it uses less digits than its factorization.

804913642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306633.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 804913642 is about 28371.0000176236. Note that the first 4 decimals coincide. The cubic root of 804913642 is about 930.2144809205.

The spelling of 804913642 in words is "eight hundred four million, nine hundred thirteen thousand, six hundred forty-two".