7804945978 has 8 divisors (see below), whose sum is σ = 11710764000. Its totient is φ = 3901357980.

The previous prime is 7804945957. The next prime is 7804945979. The reversal of 7804945978 is 8795494087.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (7804945979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 548728 + ... + 562771.

It is an arithmetic number, because the mean of its divisors is an integer number (1463845500).

Almost surely, 2^7804945978 is an apocalyptic number.

7804945978 is a deficient number, since it is larger than the sum of its proper divisors (3905818022).

7804945978 is a wasteful number, since it uses less digits than its factorization.

7804945978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1115012.

The product of its (nonzero) digits is 20321280, while the sum is 61.

The square root of 7804945978 is about 88345.6053123187. The cubic root of 7804945978 is about 1983.6115747261.

The spelling of 7804945978 in words is "seven billion, eight hundred four million, nine hundred forty-five thousand, nine hundred seventy-eight".