4394781 has 6 divisors (see below), whose sum is σ = 6348030. Its totient is φ = 2929848.

The previous prime is 4394773. The next prime is 4394783. The reversal of 4394781 is 1874934.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 4372281 + 22500 = 2091^2 + 150^2 .

It is not a de Polignac number, because 4394781 - 2³ = 4394773 is a prime.

It is a super-2 number, since 2×4394781² = 38628200075922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4394783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 244146 + ... + 244163.

It is an arithmetic number, because the mean of its divisors is an integer number (1058005).

Almost surely, 2^4394781 is an apocalyptic number.

It is an amenable number.

4394781 is a deficient number, since it is larger than the sum of its proper divisors (1953249).

4394781 is a wasteful number, since it uses less digits than its factorization.

4394781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488315 (or 488312 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 4394781 is about 2096.3732969106. The cubic root of 4394781 is about 163.7994400371.

The spelling of 4394781 in words is "four million, three hundred ninety-four thousand, seven hundred eighty-one".