3890978 has 16 divisors (see below), whose sum is σ = 7183680. Its totient is φ = 1539216.

The previous prime is 3890969. The next prime is 3890981. The reversal of 3890978 is 8790983.

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 in 7 ways as a sum of consecutive naturals, for example, 10508 + ... + 10871.

It is an arithmetic number, because the mean of its divisors is an integer number (448980).

Almost surely, 2^3890978 is an apocalyptic number.

3890978 is a deficient number, since it is larger than the sum of its proper divisors (3292702).

3890978 is a wasteful number, since it uses less digits than its factorization.

3890978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21401.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 3890978 is about 1972.5562095920. The cubic root of 3890978 is about 157.2846203608.

The spelling of 3890978 in words is "three million, eight hundred ninety thousand, nine hundred seventy-eight".