4187728 has 20 divisors (see below), whose sum is σ = 8376448. Its totient is φ = 2026080.

The previous prime is 4187719. The next prime is 4187731. The reversal of 4187728 is 8277814.

4187728 is an admirable number.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3726 + ... + 4717.

Almost surely, 2^4187728 is an apocalyptic number.

It is an amenable number.

4187728 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

4187728 is a wasteful number, since it uses less digits than its factorization.

4187728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8482 (or 8476 counting only the distinct ones).

The product of its digits is 25088, while the sum is 37.

The square root of 4187728 is about 2046.3939014764. The cubic root of 4187728 is about 161.1855684733.

It can be divided in two parts, 41877 and 28, that added together give a triangular number (41905 = T₂₈₉).

The spelling of 4187728 in words is "four million, one hundred eighty-seven thousand, seven hundred twenty-eight".