3904428 has 36 divisors (see below), whose sum is σ = 10017560. Its totient is φ = 1182720.

The previous prime is 3904409. The next prime is 3904447. The reversal of 3904428 is 8244093.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3904409) and next prime (3904447).

It is a junction number, because it is equal to n+sod(n) for n = 3904395 and 3904404.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 108 + ... + 2796.

Almost surely, 2^3904428 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3904428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5008780).

3904428 is an abundant number, since it is smaller than the sum of its proper divisors (6113132).

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

3904428 is a wasteful number, since it uses less digits than its factorization.

3904428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2718 (or 2705 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 3904428 is about 1975.9625502524. The cubic root of 3904428 is about 157.4656412832.

The spelling of 3904428 in words is "three million, nine hundred four thousand, four hundred twenty-eight".