3961128 has 16 divisors (see below), whose sum is σ = 9902880. Its totient is φ = 1320368.

The previous prime is 3961121. The next prime is 3961147. The reversal of 3961128 is 8211693.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 3961095 and 3961104.

It is not an unprimeable number, because it can be changed into a prime (3961121) 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, 82500 + ... + 82547.

It is an arithmetic number, because the mean of its divisors is an integer number (618930).

Almost surely, 2^3961128 is an apocalyptic number.

It is an amenable number.

3961128 is an abundant number, since it is smaller than the sum of its proper divisors (5941752).

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

3961128 is a wasteful number, since it uses less digits than its factorization.

3961128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165056 (or 165052 counting only the distinct ones).

The product of its digits is 2592, while the sum is 30.

The square root of 3961128 is about 1990.2582746970. The cubic root of 3961128 is about 158.2242183266.

The spelling of 3961128 in words is "three million, nine hundred sixty-one thousand, one hundred twenty-eight".