4091778 has 24 divisors (see below), whose sum is σ = 8955648. Its totient is φ = 1350072.

The previous prime is 4091777. The next prime is 4091797. The reversal of 4091778 is 8771904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4091771) 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 in 11 ways as a sum of consecutive naturals, for example, 751 + ... + 2957.

It is an arithmetic number, because the mean of its divisors is an integer number (373152).

Almost surely, 2^4091778 is an apocalyptic number.

4091778 is an abundant number, since it is smaller than the sum of its proper divisors (4863870).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4091778 is a wasteful number, since it uses less digits than its factorization.

4091778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2318 (or 2315 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 4091778 is about 2022.8143760612. The cubic root of 4091778 is about 159.9450071425.

It can be divided in two parts, 409 and 1778, that added together give a 7-th power (2187 = 3⁷).

The spelling of 4091778 in words is "four million, ninety-one thousand, seven hundred seventy-eight".