3866428 has 12 divisors (see below), whose sum is σ = 6791400. Its totient is φ = 1926032.

The previous prime is 3866419. The next prime is 3866437. The reversal of 3866428 is 8246683.

It is an interprime number because it is at equal distance from previous prime (3866419) and next prime (3866437).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 478 + ... + 2821.

It is an arithmetic number, because the mean of its divisors is an integer number (565950).

Almost surely, 2^3866428 is an apocalyptic number.

It is an amenable number.

3866428 is a deficient number, since it is larger than the sum of its proper divisors (2924972).

3866428 is a wasteful number, since it uses less digits than its factorization.

3866428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3596 (or 3594 counting only the distinct ones).

The product of its digits is 55296, while the sum is 37.

The square root of 3866428 is about 1966.3234728803. The cubic root of 3866428 is about 156.9531281232.

It can be divided in two parts, 38 and 66428, that added together give a palindrome (66466).

The spelling of 3866428 in words is "three million, eight hundred sixty-six thousand, four hundred twenty-eight".