8000078 has 4 divisors (see below), whose sum is σ = 12000120. Its totient is φ = 4000038.

The previous prime is 8000071. The next prime is 8000087. The reversal of 8000078 is 8700008.

It is a semiprime because it is the product of two primes.

8000078 is a modest number, since divided by 78 gives 8 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8000071) by changing a digit.

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 as a sum of consecutive naturals, namely, 2000018 + ... + 2000021.

It is an arithmetic number, because the mean of its divisors is an integer number (3000030).

Almost surely, 2^8000078 is an apocalyptic number.

8000078 is a deficient number, since it is larger than the sum of its proper divisors (4000042).

8000078 is a wasteful number, since it uses less digits than its factorization.

8000078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4000041.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 8000078 is about 2828.4409132948. The cubic root of 8000078 is about 200.0006499979. Note that the first 3 decimals are identical.

The spelling of 8000078 in words is "eight million, seventy-eight", and thus it is an aban number and an uban number.