28671588 has 72 divisors (see below), whose sum is σ = 83734560. Its totient is φ = 8175360.

The previous prime is 28671557. The next prime is 28671611. The reversal of 28671588 is 88517682.

28671588 is a `hidden beast` number, since 2 + 8 + 67 + 1 + 588 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4603 + ... + 8861.

It is an arithmetic number, because the mean of its divisors is an integer number (1162980).

Almost surely, 2^28671588 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 28671588, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41867280).

28671588 is an abundant number, since it is smaller than the sum of its proper divisors (55062972).

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

28671588 is a wasteful number, since it uses less digits than its factorization.

28671588 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4297 (or 4292 counting only the distinct ones).

The product of its digits is 215040, while the sum is 45.

The square root of 28671588 is about 5354.5856982590. The cubic root of 28671588 is about 306.0675232253.

The spelling of 28671588 in words is "twenty-eight million, six hundred seventy-one thousand, five hundred eighty-eight".