28767872 has 64 divisors (see below), whose sum is σ = 66373440. Its totient is φ = 12165120.

The previous prime is 28767839. The next prime is 28767911. The reversal of 28767872 is 27876782.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

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, 86747 + ... + 87077.

It is an arithmetic number, because the mean of its divisors is an integer number (1037085).

Almost surely, 2^28767872 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 28767872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33186720).

28767872 is an abundant number, since it is smaller than the sum of its proper divisors (37605568).

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

28767872 is an equidigital number, since it uses as much as digits as its factorization.

28767872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449 (or 437 counting only the distinct ones).

The product of its digits is 526848, while the sum is 47.

The square root of 28767872 is about 5363.5689610557. The cubic root of 28767872 is about 306.4097491143.

The spelling of 28767872 in words is "twenty-eight million, seven hundred sixty-seven thousand, eight hundred seventy-two".