804427978 has 16 divisors (see below), whose sum is σ = 1215466560. Its totient is φ = 399279136.

The previous prime is 804427931. The next prime is 804427997. The reversal of 804427978 is 879724408.

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, 419550 + ... + 421462.

It is an arithmetic number, because the mean of its divisors is an integer number (75966660).

Almost surely, 2^804427978 is an apocalyptic number.

804427978 is a deficient number, since it is larger than the sum of its proper divisors (411038582).

804427978 is a wasteful number, since it uses less digits than its factorization.

804427978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3341.

The product of its (nonzero) digits is 903168, while the sum is 49.

The square root of 804427978 is about 28362.4395636201. The cubic root of 804427978 is about 930.0273541883.

The spelling of 804427978 in words is "eight hundred four million, four hundred twenty-seven thousand, nine hundred seventy-eight".