3728161 has 8 divisors (see below), whose sum is σ = 3945600. Its totient is φ = 3512880.

The previous prime is 3728149. The next prime is 3728173. The reversal of 3728161 is 1618273.

It is an interprime number because it is at equal distance from previous prime (3728149) and next prime (3728173).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3728161 is a prime.

It is a Duffinian number.

3728161 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3728141) 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, 4131 + ... + 4951.

It is an arithmetic number, because the mean of its divisors is an integer number (493200).

Almost surely, 2^3728161 is an apocalyptic number.

3728161 is the 864-th centered decagonal number.

It is an amenable number.

3728161 is a deficient number, since it is larger than the sum of its proper divisors (217439).

3728161 is a wasteful number, since it uses less digits than its factorization.

3728161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1079.

The product of its digits is 2016, while the sum is 28.

The square root of 3728161 is about 1930.8446338326. The cubic root of 3728161 is about 155.0594430347.

The spelling of 3728161 in words is "three million, seven hundred twenty-eight thousand, one hundred sixty-one".