3993442 has 4 divisors (see below), whose sum is σ = 5990166. Its totient is φ = 1996720.

The previous prime is 3993427. The next prime is 3993443. The reversal of 3993442 is 2443993.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 3031081 + 962361 = 1741^2 + 981^2 .

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 3993398 and 3993407.

It is not an unprimeable number, because it can be changed into a prime (3993443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 998359 + ... + 998362.

Almost surely, 2^3993442 is an apocalyptic number.

3993442 is a deficient number, since it is larger than the sum of its proper divisors (1996724).

3993442 is a wasteful number, since it uses less digits than its factorization.

3993442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1996723.

The product of its digits is 23328, while the sum is 34.

The square root of 3993442 is about 1998.3598274585. The cubic root of 3993442 is about 158.6533062764.

The spelling of 3993442 in words is "three million, nine hundred ninety-three thousand, four hundred forty-two".