3939642 has 24 divisors (see below), whose sum is σ = 9755616. Its totient is φ = 1125576.

The previous prime is 3939641. The next prime is 3939671. The reversal of 3939642 is 2469393.

It is a happy number.

3939642 is a `hidden beast` number, since 3 + 9 + 3 + 9 + 642 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 3939597 and 3939606.

It is not an unprimeable number, because it can be changed into a prime (3939641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15508 + ... + 15759.

It is an arithmetic number, because the mean of its divisors is an integer number (406484).

Almost surely, 2^3939642 is an apocalyptic number.

3939642 is an abundant number, since it is smaller than the sum of its proper divisors (5815974).

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

3939642 is a wasteful number, since it uses less digits than its factorization.

3939642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31282 (or 31279 counting only the distinct ones).

The product of its digits is 34992, while the sum is 36.

The square root of 3939642 is about 1984.8531431821. The cubic root of 3939642 is about 157.9376189142.

The spelling of 3939642 in words is "three million, nine hundred thirty-nine thousand, six hundred forty-two".