28681752 has 32 divisors (see below), whose sum is σ = 78223680. Its totient is φ = 8691360.

The previous prime is 28681717. The next prime is 28681753. The reversal of 28681752 is 25718682.

It is a self number, because there is not a number n which added to its sum of digits gives 28681752.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28681753) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54058 + ... + 54585.

It is an arithmetic number, because the mean of its divisors is an integer number (2444490).

Almost surely, 2^28681752 is an apocalyptic number.

28681752 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28681752 is an abundant number, since it is smaller than the sum of its proper divisors (49541928).

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

28681752 is a wasteful number, since it uses less digits than its factorization.

28681752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108663 (or 108659 counting only the distinct ones).

The product of its digits is 53760, while the sum is 39.

The square root of 28681752 is about 5355.5347071978. The cubic root of 28681752 is about 306.1036856541.

The spelling of 28681752 in words is "twenty-eight million, six hundred eighty-one thousand, seven hundred fifty-two".