28693672 has 32 divisors (see below), whose sum is σ = 62337600. Its totient is φ = 12127104.

The previous prime is 28693663. The next prime is 28693741. The reversal of 28693672 is 27639682.

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 7 ways as a sum of consecutive naturals, for example, 579 + ... + 7597.

It is an arithmetic number, because the mean of its divisors is an integer number (1948050).

Almost surely, 2^28693672 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28693672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31168800).

28693672 is an abundant number, since it is smaller than the sum of its proper divisors (33643928).

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

28693672 is a wasteful number, since it uses less digits than its factorization.

28693672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7105 (or 7101 counting only the distinct ones).

The product of its digits is 217728, while the sum is 43.

The square root of 28693672 is about 5356.6474589990. The cubic root of 28693672 is about 306.1460848607.

The spelling of 28693672 in words is "twenty-eight million, six hundred ninety-three thousand, six hundred seventy-two".