3913728 has 144 divisors (see below), whose sum is σ = 13071240. Its totient is φ = 1032192.

The previous prime is 3913727. The next prime is 3913747. The reversal of 3913728 is 8273193.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3913727) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 301050 + ... + 301062.

Almost surely, 2^3913728 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 3913728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6535620).

3913728 is an abundant number, since it is smaller than the sum of its proper divisors (9157512).

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

3913728 is a wasteful number, since it uses less digits than its factorization.

3913728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52 (or 25 counting only the distinct ones).

The product of its digits is 9072, while the sum is 33.

The square root of 3913728 is about 1978.3144340574. The cubic root of 3913728 is about 157.5905651974.

The spelling of 3913728 in words is "three million, nine hundred thirteen thousand, seven hundred twenty-eight".