3942978 has 16 divisors (see below), whose sum is σ = 8492736. Its totient is φ = 1213200.

The previous prime is 3942977. The next prime is 3942989. The reversal of 3942978 is 8792493.

It is not an unprimeable number, because it can be changed into a prime (3942977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25198 + ... + 25353.

It is an arithmetic number, because the mean of its divisors is an integer number (530796).

Almost surely, 2^3942978 is an apocalyptic number.

3942978 is an abundant number, since it is smaller than the sum of its proper divisors (4549758).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3942978 is a wasteful number, since it uses less digits than its factorization.

3942978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50569.

The product of its digits is 108864, while the sum is 42.

The square root of 3942978 is about 1985.6933297969. The cubic root of 3942978 is about 157.9821856751.

The spelling of 3942978 in words is "three million, nine hundred forty-two thousand, nine hundred seventy-eight".