3878978 has 4 divisors (see below), whose sum is σ = 5818470. Its totient is φ = 1939488.

The previous prime is 3878947. The next prime is 3878981. The reversal of 3878978 is 8798783.

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

It can be written as a sum of positive squares in only one way, i.e., 3713329 + 165649 = 1927^2 + 407^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 969743 + ... + 969746.

Almost surely, 2^3878978 is an apocalyptic number.

3878978 is a deficient number, since it is larger than the sum of its proper divisors (1939492).

3878978 is a wasteful number, since it uses less digits than its factorization.

3878978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1939491.

The product of its digits is 677376, while the sum is 50.

The square root of 3878978 is about 1969.5121223288. The cubic root of 3878978 is about 157.1227622474.

The spelling of 3878978 in words is "three million, eight hundred seventy-eight thousand, nine hundred seventy-eight".