3864478 has 8 divisors (see below), whose sum is σ = 5838840. Its totient is φ = 1918200.

The previous prime is 3864473. The next prime is 3864479. The reversal of 3864478 is 8744683.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 3864478.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3864473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6673 + ... + 7228.

It is an arithmetic number, because the mean of its divisors is an integer number (729855).

Almost surely, 2^3864478 is an apocalyptic number.

3864478 is a deficient number, since it is larger than the sum of its proper divisors (1974362).

3864478 is a wasteful number, since it uses less digits than its factorization.

3864478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14042.

The product of its digits is 129024, while the sum is 40.

The square root of 3864478 is about 1965.8275611050. The cubic root of 3864478 is about 156.9267376954.

It can be divided in two parts, 38 and 64478, that added together give a square (64516 = 254²).

The spelling of 3864478 in words is "three million, eight hundred sixty-four thousand, four hundred seventy-eight".