3921472 has 28 divisors (see below), whose sum is σ = 7900416. Its totient is φ = 1930880.

The previous prime is 3921451. The next prime is 3921497. The reversal of 3921472 is 2741293.

3921472 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 3921472.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4113 + ... + 4975.

Almost surely, 2^3921472 is an apocalyptic number.

3921472 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3921472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3950208).

3921472 is an abundant number, since it is smaller than the sum of its proper divisors (3978944).

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

3921472 is an equidigital number, since it uses as much as digits as its factorization.

3921472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 946 (or 936 counting only the distinct ones).

The product of its digits is 3024, while the sum is 28.

The square root of 3921472 is about 1980.2706885676. The cubic root of 3921472 is about 157.6944369456.

The spelling of 3921472 in words is "three million, nine hundred twenty-one thousand, four hundred seventy-two".