3878478 has 12 divisors (see below), whose sum is σ = 8403408. Its totient is φ = 1292820.

The previous prime is 3878449. The next prime is 3878491. The reversal of 3878478 is 8748783.

It is a super-4 number, since 4×3878478⁴ (a number of 27 digits) contains 4444 as substring.

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 5 ways as a sum of consecutive naturals, for example, 107718 + ... + 107753.

It is an arithmetic number, because the mean of its divisors is an integer number (700284).

Almost surely, 2^3878478 is an apocalyptic number.

3878478 is an abundant number, since it is smaller than the sum of its proper divisors (4524930).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3878478 is a wasteful number, since it uses less digits than its factorization.

3878478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215479 (or 215476 counting only the distinct ones).

The product of its digits is 301056, while the sum is 45.

The square root of 3878478 is about 1969.3851832488. The cubic root of 3878478 is about 157.1160109196.

It can be divided in two parts, 3878 and 478, that added together give a square (4356 = 66²).

The spelling of 3878478 in words is "three million, eight hundred seventy-eight thousand, four hundred seventy-eight".