4378778 has 16 divisors (see below), whose sum is σ = 6972000. Its totient is φ = 2056752.

The previous prime is 4378771. The next prime is 4378789. The reversal of 4378778 is 8778734.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (4378771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4868 + ... + 5696.

It is an arithmetic number, because the mean of its divisors is an integer number (435750).

Almost surely, 2^4378778 is an apocalyptic number.

4378778 is a deficient number, since it is larger than the sum of its proper divisors (2593222).

4378778 is a wasteful number, since it uses less digits than its factorization.

4378778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 989.

The product of its digits is 263424, while the sum is 44.

The square root of 4378778 is about 2092.5529861870. The cubic root of 4378778 is about 163.6003803970.

Subtracting from 4378778 its sum of digits (44), we obtain a palindrome (4378734).

The spelling of 4378778 in words is "four million, three hundred seventy-eight thousand, seven hundred seventy-eight".