13784728 has 32 divisors (see below), whose sum is σ = 28396800. Its totient is φ = 6244128.

The previous prime is 13784713. The next prime is 13784761. The reversal of 13784728 is 82748731.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 1525 + ... + 5467.

It is an arithmetic number, because the mean of its divisors is an integer number (887400).

Almost surely, 2^13784728 is an apocalyptic number.

It is an amenable number.

13784728 is an abundant number, since it is smaller than the sum of its proper divisors (14612072).

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

13784728 is a wasteful number, since it uses less digits than its factorization.

13784728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3991 (or 3987 counting only the distinct ones).

The product of its digits is 75264, while the sum is 40.

The square root of 13784728 is about 3712.7790130844. The cubic root of 13784728 is about 239.7725159288.

The spelling of 13784728 in words is "thirteen million, seven hundred eighty-four thousand, seven hundred twenty-eight".