3993428 has 12 divisors (see below), whose sum is σ = 7026432. Its totient is φ = 1985880.

The previous prime is 3993427. The next prime is 3993443. The reversal of 3993428 is 8243993.

It is a junction number, because it is equal to n+sod(n) for n = 3993391 and 3993400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3993427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1850 + ... + 3377.

It is an arithmetic number, because the mean of its divisors is an integer number (585536).

Almost surely, 2^3993428 is an apocalyptic number.

It is an amenable number.

3993428 is a deficient number, since it is larger than the sum of its proper divisors (3033004).

3993428 is a wasteful number, since it uses less digits than its factorization.

3993428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5422 (or 5420 counting only the distinct ones).

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

The square root of 3993428 is about 1998.3563245828. The cubic root of 3993428 is about 158.6531208767.

The spelling of 3993428 in words is "three million, nine hundred ninety-three thousand, four hundred twenty-eight".