28947488 has 48 divisors (see below), whose sum is σ = 61326720. Its totient is φ = 13406976.

The previous prime is 28947461. The next prime is 28947497. The reversal of 28947488 is 88474982.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28070 + ... + 29082.

It is an arithmetic number, because the mean of its divisors is an integer number (1277640).

Almost surely, 2^28947488 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 28947488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30663360).

28947488 is an abundant number, since it is smaller than the sum of its proper divisors (32379232).

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

28947488 is a wasteful number, since it uses less digits than its factorization.

28947488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1089 (or 1081 counting only the distinct ones).

The product of its digits is 1032192, while the sum is 50.

The square root of 28947488 is about 5380.2869811935. The cubic root of 28947488 is about 307.0461297204.

The spelling of 28947488 in words is "twenty-eight million, nine hundred forty-seven thousand, four hundred eighty-eight".