4478869 has 2 divisors, whose sum is σ = 4478870. Its totient is φ = 4478868.

The previous prime is 4478863. The next prime is 4478879. The reversal of 4478869 is 9688744.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3348900 + 1129969 = 1830^2 + 1063^2 .

It is a cyclic number.

It is not a de Polignac number, because 4478869 - 2³ = 4478861 is a prime.

It is a super-2 number, since 2×4478869² = 40120535038322, which contains 22 as substring.

4478869 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4478861) 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 as a sum of consecutive naturals, namely, 2239434 + 2239435.

It is an arithmetic number, because the mean of its divisors is an integer number (2239435).

Almost surely, 2^4478869 is an apocalyptic number.

It is an amenable number.

4478869 is a deficient number, since it is larger than the sum of its proper divisors (1).

4478869 is an equidigital number, since it uses as much as digits as its factorization.

4478869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 387072, while the sum is 46.

The square root of 4478869 is about 2116.3338583503. Note that the first 3 decimals coincide. The cubic root of 4478869 is about 164.8375382841.

It can be divided in two parts, 447 and 8869, that added together give a triangular number (9316 = T₁₃₆).

The spelling of 4478869 in words is "four million, four hundred seventy-eight thousand, eight hundred sixty-nine".