3992438 has 4 divisors (see below), whose sum is σ = 5988660. Its totient is φ = 1996218.

The previous prime is 3992419. The next prime is 3992441. The reversal of 3992438 is 8342993.

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

It is a super-2 number, since 2×3992438² = 31879122367688, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 998108 + ... + 998111.

It is an arithmetic number, because the mean of its divisors is an integer number (1497165).

Almost surely, 2^3992438 is an apocalyptic number.

3992438 is a deficient number, since it is larger than the sum of its proper divisors (1996222).

3992438 is a wasteful number, since it uses less digits than its factorization.

3992438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1996221.

The product of its digits is 46656, while the sum is 38.

The square root of 3992438 is about 1998.1086056569. The cubic root of 3992438 is about 158.6400093703.

The spelling of 3992438 in words is "three million, nine hundred ninety-two thousand, four hundred thirty-eight".