3928161 has 8 divisors (see below), whose sum is σ = 5326560. Its totient is φ = 2574272.

The previous prime is 3928159. The next prime is 3928163. The reversal of 3928161 is 1618293.

It is an interprime number because it is at equal distance from previous prime (3928159) and next prime (3928163).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3928161 - 2¹ = 3928159 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (3928163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10920 + ... + 11273.

It is an arithmetic number, because the mean of its divisors is an integer number (665820).

Almost surely, 2^3928161 is an apocalyptic number.

It is an amenable number.

3928161 is a deficient number, since it is larger than the sum of its proper divisors (1398399).

3928161 is a wasteful number, since it uses less digits than its factorization.

3928161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22255.

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

The square root of 3928161 is about 1981.9588794927. The cubic root of 3928161 is about 157.7840477609.

The spelling of 3928161 in words is "three million, nine hundred twenty-eight thousand, one hundred sixty-one".