28688176 has 80 divisors (see below), whose sum is σ = 66781440. Its totient is φ = 11784960.

The previous prime is 28688173. The next prime is 28688213. The reversal of 28688176 is 67188682.

It is a super-2 number, since 2×28688176² = 1646022884413952, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is not an unprimeable number, because it can be changed into a prime (28688173) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76726 + ... + 77098.

It is an arithmetic number, because the mean of its divisors is an integer number (834768).

Almost surely, 2^28688176 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 28688176, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33390720).

28688176 is an abundant number, since it is smaller than the sum of its proper divisors (38093264).

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

28688176 is a wasteful number, since it uses less digits than its factorization.

28688176 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434 (or 428 counting only the distinct ones).

The product of its digits is 258048, while the sum is 46.

The square root of 28688176 is about 5356.1344269912. The cubic root of 28688176 is about 306.1265371555.

The spelling of 28688176 in words is "twenty-eight million, six hundred eighty-eight thousand, one hundred seventy-six".