3992638 has 8 divisors (see below), whose sum is σ = 6449688. Its totient is φ = 1842744.

The previous prime is 3992627. The next prime is 3992683. The reversal of 3992638 is 8362993.

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

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 3992638.

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, 76756 + ... + 76807.

It is an arithmetic number, because the mean of its divisors is an integer number (806211).

Almost surely, 2^3992638 is an apocalyptic number.

3992638 is a deficient number, since it is larger than the sum of its proper divisors (2457050).

3992638 is a wasteful number, since it uses less digits than its factorization.

3992638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153578.

The product of its digits is 69984, while the sum is 40.

The square root of 3992638 is about 1998.1586523597. The cubic root of 3992638 is about 158.6426583342.

The spelling of 3992638 in words is "three million, nine hundred ninety-two thousand, six hundred thirty-eight".