28069472 has 24 divisors (see below), whose sum is σ = 55837656. Its totient is φ = 13888512.

The previous prime is 28069471. The next prime is 28069487. The reversal of 28069472 is 27496082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28069471) by changing a digit.

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, 1418 + ... + 7625.

It is an arithmetic number, because the mean of its divisors is an integer number (2326569).

Almost surely, 2^28069472 is an apocalyptic number.

It is an amenable number.

28069472 is a deficient number, since it is larger than the sum of its proper divisors (27768184).

28069472 is an equidigital number, since it uses as much as digits as its factorization.

28069472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9150 (or 9142 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 28069472 is about 5298.0630422825. The cubic root of 28069472 is about 303.9098301363.

The spelling of 28069472 in words is "twenty-eight million, sixty-nine thousand, four hundred seventy-two".