3988978 has 8 divisors (see below), whose sum is σ = 6838272. Its totient is φ = 1709556.

The previous prime is 3988969. The next prime is 3988991. The reversal of 3988978 is 8798893.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142450 + ... + 142477.

It is an arithmetic number, because the mean of its divisors is an integer number (854784).

Almost surely, 2^3988978 is an apocalyptic number.

3988978 is a deficient number, since it is larger than the sum of its proper divisors (2849294).

3988978 is a wasteful number, since it uses less digits than its factorization.

3988978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284936.

The product of its digits is 870912, while the sum is 52.

The square root of 3988978 is about 1997.2425991852. The cubic root of 3988978 is about 158.5941682850.

The spelling of 3988978 in words is "three million, nine hundred eighty-eight thousand, nine hundred seventy-eight".