3942078 has 32 divisors (see below), whose sum is σ = 9206784. Its totient is φ = 1101792.

The previous prime is 3942067. The next prime is 3942089. The reversal of 3942078 is 8702493.

It is an interprime number because it is at equal distance from previous prime (3942067) and next prime (3942089).

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 976 + ... + 2972.

It is an arithmetic number, because the mean of its divisors is an integer number (287712).

Almost surely, 2^3942078 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3942078, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4603392).

3942078 is an abundant number, since it is smaller than the sum of its proper divisors (5264706).

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

3942078 is a wasteful number, since it uses less digits than its factorization.

3942078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2056.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 3942078 is about 1985.4666957670. The cubic root of 3942078 is about 157.9701647452.

The spelling of 3942078 in words is "three million, nine hundred forty-two thousand, seventy-eight".