4091028 has 12 divisors (see below), whose sum is σ = 9545760. Its totient is φ = 1363672.

The previous prime is 4091011. The next prime is 4091047. The reversal of 4091028 is 8201904.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 4090989 and 4091007.

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, 170448 + ... + 170471.

It is an arithmetic number, because the mean of its divisors is an integer number (795480).

Almost surely, 2^4091028 is an apocalyptic number.

It is an amenable number.

4091028 is an abundant number, since it is smaller than the sum of its proper divisors (5454732).

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

4091028 is a wasteful number, since it uses less digits than its factorization.

4091028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340926 (or 340924 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 4091028 is about 2022.6289822901. The cubic root of 4091028 is about 159.9352342039.

The spelling of 4091028 in words is "four million, ninety-one thousand, twenty-eight".