3942816 has 48 divisors (see below), whose sum is σ = 10521504. Its totient is φ = 1292544.

The previous prime is 3942781. The next prime is 3942839. The reversal of 3942816 is 6182493.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6126 + ... + 6738.

It is an arithmetic number, because the mean of its divisors is an integer number (219198).

Almost surely, 2^3942816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3942816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5260752).

3942816 is an abundant number, since it is smaller than the sum of its proper divisors (6578688).

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

3942816 is a wasteful number, since it uses less digits than its factorization.

3942816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693 (or 685 counting only the distinct ones).

The product of its digits is 10368, while the sum is 33.

The square root of 3942816 is about 1985.6525375805. The cubic root of 3942816 is about 157.9800220428.

The spelling of 3942816 in words is "three million, nine hundred forty-two thousand, eight hundred sixteen".