3998428 has 24 divisors (see below), whose sum is σ = 8131424. Its totient is φ = 1684800.

The previous prime is 3998419. The next prime is 3998459. The reversal of 3998428 is 8248993.

It is a happy number.

3998428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 538 + ... + 2878.

Almost surely, 2^3998428 is an apocalyptic number.

It is an amenable number.

3998428 is an abundant number, since it is smaller than the sum of its proper divisors (4132996).

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

3998428 is a wasteful number, since it uses less digits than its factorization.

3998428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2413 (or 2411 counting only the distinct ones).

The product of its digits is 124416, while the sum is 43.

The square root of 3998428 is about 1999.6069613802. The cubic root of 3998428 is about 158.7193075183.

The spelling of 3998428 in words is "three million, nine hundred ninety-eight thousand, four hundred twenty-eight".