28120672 has 24 divisors (see below), whose sum is σ = 55494936. Its totient is φ = 14026752.

The previous prime is 28120661. The next prime is 28120693. The reversal of 28120672 is 27602182.

It is a self number, because there is not a number n which added to its sum of digits gives 28120672.

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 3 ways as a sum of consecutive naturals, for example, 17703 + ... + 19225.

It is an arithmetic number, because the mean of its divisors is an integer number (2312289).

Almost surely, 2^28120672 is an apocalyptic number.

It is an amenable number.

28120672 is a deficient number, since it is larger than the sum of its proper divisors (27374264).

28120672 is a wasteful number, since it uses less digits than its factorization.

28120672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2110 (or 2102 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 28120672 is about 5302.8927954467. The cubic root of 28120672 is about 304.0944997072.

The spelling of 28120672 in words is "twenty-eight million, one hundred twenty thousand, six hundred seventy-two".