7948778 has 4 divisors (see below), whose sum is σ = 11923170. Its totient is φ = 3974388.

The previous prime is 7948769. The next prime is 7948817. The reversal of 7948778 is 8778497.

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., 5442889 + 2505889 = 2333^2 + 1583^2 .

It is an unprimeable number.

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, 1987193 + ... + 1987196.

Almost surely, 2^7948778 is an apocalyptic number.

7948778 is a deficient number, since it is larger than the sum of its proper divisors (3974392).

7948778 is a wasteful number, since it uses less digits than its factorization.

7948778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3974391.

The product of its digits is 790272, while the sum is 50.

The square root of 7948778 is about 2819.3577282778. The cubic root of 7948778 is about 199.5722357410.

The spelling of 7948778 in words is "seven million, nine hundred forty-eight thousand, seven hundred seventy-eight".