3942836 has 6 divisors (see below), whose sum is σ = 6899970. Its totient is φ = 1971416.

The previous prime is 3942781. The next prime is 3942839. The reversal of 3942836 is 6382493.

It is a happy number.

3942836 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 3312400 + 630436 = 1820^2 + 794^2 .

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 3942796 and 3942805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3942839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 492851 + ... + 492858.

It is an arithmetic number, because the mean of its divisors is an integer number (1149995).

Almost surely, 2^3942836 is an apocalyptic number.

It is an amenable number.

3942836 is a deficient number, since it is larger than the sum of its proper divisors (2957134).

3942836 is a wasteful number, since it uses less digits than its factorization.

3942836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 985713 (or 985711 counting only the distinct ones).

The product of its digits is 31104, while the sum is 35.

The square root of 3942836 is about 1985.6575737020. The cubic root of 3942836 is about 157.9802891611.

It can be divided in two parts, 39 and 42836, that added together give a cube (42875 = 35³).

The spelling of 3942836 in words is "three million, nine hundred forty-two thousand, eight hundred thirty-six".