3865478 has 4 divisors (see below), whose sum is σ = 5798220. Its totient is φ = 1932738.

The previous prime is 3865469. The next prime is 3865481. The reversal of 3865478 is 8745683.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 966368 + ... + 966371.

It is an arithmetic number, because the mean of its divisors is an integer number (1449555).

Almost surely, 2^3865478 is an apocalyptic number.

3865478 is a deficient number, since it is larger than the sum of its proper divisors (1932742).

3865478 is a wasteful number, since it uses less digits than its factorization.

3865478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1932741.

The product of its digits is 161280, while the sum is 41.

The square root of 3865478 is about 1966.0818904613. The cubic root of 3865478 is about 156.9402723568.

The spelling of 3865478 in words is "three million, eight hundred sixty-five thousand, four hundred seventy-eight".