28470688 has 48 divisors (see below), whose sum is σ = 59222016. Its totient is φ = 13446400.

The previous prime is 28470653. The next prime is 28470697. The reversal of 28470688 is 88607482.

It is a super-3 number, since 3×28470688³ (a number of 23 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74145 + ... + 74527.

It is an arithmetic number, because the mean of its divisors is an integer number (1233792).

Almost surely, 2^28470688 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 28470688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29611008).

28470688 is an abundant number, since it is smaller than the sum of its proper divisors (30751328).

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

28470688 is a wasteful number, since it uses less digits than its factorization.

28470688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517 (or 509 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 43.

The square root of 28470688 is about 5335.7930994370. The cubic root of 28470688 is about 305.3509817775.

The spelling of 28470688 in words is "twenty-eight million, four hundred seventy thousand, six hundred eighty-eight".