804990945 has 32 divisors (see below), whose sum is σ = 1408728960. Its totient is φ = 389283840.

The previous prime is 804990943. The next prime is 804990947. The reversal of 804990945 is 549099408.

It is an interprime number because it is at equal distance from previous prime (804990943) and next prime (804990947).

It is not a de Polignac number, because 804990945 - 2¹ = 804990943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 804990894 and 804990903.

It is not an unprimeable number, because it can be changed into a prime (804990941) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59361 + ... + 71649.

It is an arithmetic number, because the mean of its divisors is an integer number (44022780).

Almost surely, 2^804990945 is an apocalyptic number.

It is an amenable number.

804990945 is a deficient number, since it is larger than the sum of its proper divisors (603738015).

804990945 is a wasteful number, since it uses less digits than its factorization.

804990945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12705.

The product of its (nonzero) digits is 466560, while the sum is 48.

The square root of 804990945 is about 28372.3623443660. The cubic root of 804990945 is about 930.2442588844.

The spelling of 804990945 in words is "eight hundred four million, nine hundred ninety thousand, nine hundred forty-five".