3987778 has 8 divisors (see below), whose sum is σ = 6174720. Its totient is φ = 1929540.

The previous prime is 3987769. The next prime is 3987791. The reversal of 3987778 is 8777893.

It is a happy number.

3987778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32098 + ... + 32221.

It is an arithmetic number, because the mean of its divisors is an integer number (771840).

Almost surely, 2^3987778 is an apocalyptic number.

3987778 is a deficient number, since it is larger than the sum of its proper divisors (2186942).

3987778 is a wasteful number, since it uses less digits than its factorization.

3987778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64352.

The product of its digits is 592704, while the sum is 49.

The square root of 3987778 is about 1996.9421624073. The cubic root of 3987778 is about 158.5782634518.

The spelling of 3987778 in words is "three million, nine hundred eighty-seven thousand, seven hundred seventy-eight".