3982778 has 4 divisors (see below), whose sum is σ = 5974170. Its totient is φ = 1991388.

The previous prime is 3982763. The next prime is 3982801. The reversal of 3982778 is 8772893.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8772893 = 41 ⋅213973.

It can be written as a sum of positive squares in only one way, i.e., 2968729 + 1014049 = 1723^2 + 1007^2 .

It is a Curzon 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 as a sum of consecutive naturals, namely, 995693 + ... + 995696.

Almost surely, 2^3982778 is an apocalyptic number.

3982778 is a deficient number, since it is larger than the sum of its proper divisors (1991392).

3982778 is a wasteful number, since it uses less digits than its factorization.

3982778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1991391.

The product of its digits is 169344, while the sum is 44.

The square root of 3982778 is about 1995.6898556640. The cubic root of 3982778 is about 158.5119589473.

The spelling of 3982778 in words is "three million, nine hundred eighty-two thousand, seven hundred seventy-eight".