4778978 has 8 divisors (see below), whose sum is σ = 7191120. Its totient is φ = 2381940.

The previous prime is 4778953. The next prime is 4778981. The reversal of 4778978 is 8798774.

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2948 + ... + 4271.

It is an arithmetic number, because the mean of its divisors is an integer number (898890).

Almost surely, 2^4778978 is an apocalyptic number.

4778978 is a deficient number, since it is larger than the sum of its proper divisors (2412142).

4778978 is a wasteful number, since it uses less digits than its factorization.

4778978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7552.

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

The square root of 4778978 is about 2186.0873724534. The cubic root of 4778978 is about 168.4399137697.

The spelling of 4778978 in words is "four million, seven hundred seventy-eight thousand, nine hundred seventy-eight".