3955728 has 80 divisors (see below), whose sum is σ = 11931776. Its totient is φ = 1105920.

The previous prime is 3955727. The next prime is 3955733. The reversal of 3955728 is 8275593.

3955728 is nontrivially palindromic in base 13.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (3955723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20400 + ... + 20592.

Almost surely, 2^3955728 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 3955728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5965888).

3955728 is an abundant number, since it is smaller than the sum of its proper divisors (7976048).

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

3955728 is a wasteful number, since it uses less digits than its factorization.

3955728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272 (or 266 counting only the distinct ones).

The product of its digits is 75600, while the sum is 39.

The square root of 3955728 is about 1988.9012041829. The cubic root of 3955728 is about 158.1522860108.

The spelling of 3955728 in words is "three million, nine hundred fifty-five thousand, seven hundred twenty-eight".