3665428 has 12 divisors (see below), whose sum is σ = 6908020. Its totient is φ = 1691712.

The previous prime is 3665419. The next prime is 3665437. The reversal of 3665428 is 8245663.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3665419) and next prime (3665437).

It can be written as a sum of positive squares in 2 ways, for example, as 345744 + 3319684 = 588^2 + 1822^2 .

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 3665393 and 3665402.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 35193 + ... + 35296.

Almost surely, 2^3665428 is an apocalyptic number.

It is an amenable number.

3665428 is a deficient number, since it is larger than the sum of its proper divisors (3242592).

3665428 is a wasteful number, since it uses less digits than its factorization.

3665428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70506 (or 70504 counting only the distinct ones).

The product of its digits is 34560, while the sum is 34.

The square root of 3665428 is about 1914.5307519076. The cubic root of 3665428 is about 154.1848009185.

The spelling of 3665428 in words is "three million, six hundred sixty-five thousand, four hundred twenty-eight".