7942778 has 8 divisors (see below), whose sum is σ = 11940480. Its totient is φ = 3962620.

The previous prime is 7942769. The next prime is 7942799. The reversal of 7942778 is 8772497.

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

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 in 3 ways as a sum of consecutive naturals, for example, 3188 + ... + 5103.

It is an arithmetic number, because the mean of its divisors is an integer number (1492560).

Almost surely, 2^7942778 is an apocalyptic number.

7942778 is a deficient number, since it is larger than the sum of its proper divisors (3997702).

7942778 is a wasteful number, since it uses less digits than its factorization.

7942778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8772.

The product of its digits is 197568, while the sum is 44.

The square root of 7942778 is about 2818.2934552669. The cubic root of 7942778 is about 199.5220085309.

The spelling of 7942778 in words is "seven million, nine hundred forty-two thousand, seven hundred seventy-eight".