8072978 has 4 divisors (see below), whose sum is σ = 12109470. Its totient is φ = 4036488.

The previous prime is 8072971. The next prime is 8072983. The reversal of 8072978 is 8792708.

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

It can be written as a sum of positive squares in only one way, i.e., 8025889 + 47089 = 2833^2 + 217^2 .

It is not an unprimeable number, because it can be changed into a prime (8072971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2018243 + ... + 2018246.

Almost surely, 2^8072978 is an apocalyptic number.

8072978 is a deficient number, since it is larger than the sum of its proper divisors (4036492).

8072978 is a wasteful number, since it uses less digits than its factorization.

8072978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4036491.

The product of its (nonzero) digits is 56448, while the sum is 41.

The square root of 8072978 is about 2841.2986467459. The cubic root of 8072978 is about 200.6063100830.

The spelling of 8072978 in words is "eight million, seventy-two thousand, nine hundred seventy-eight".