3872842 has 8 divisors (see below), whose sum is σ = 5817636. Its totient is φ = 1933632.

The previous prime is 3872839. The next prime is 3872851. The reversal of 3872842 is 2482783.

It can be written as a sum of positive squares in 2 ways, for example, as 2725801 + 1147041 = 1651^2 + 1071^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 3872798 and 3872807.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1848 + ... + 3340.

Almost surely, 2^3872842 is an apocalyptic number.

3872842 is a deficient number, since it is larger than the sum of its proper divisors (1944794).

3872842 is a wasteful number, since it uses less digits than its factorization.

3872842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2792.

The product of its digits is 21504, while the sum is 34.

The square root of 3872842 is about 1967.9537596194. The cubic root of 3872842 is about 157.0398697883.

The spelling of 3872842 in words is "three million, eight hundred seventy-two thousand, eight hundred forty-two".