28929472 has 112 divisors (see below), whose sum is σ = 70408800. Its totient is φ = 11612160.

The previous prime is 28929451. The next prime is 28929473. The reversal of 28929472 is 27492982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28929473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 265354 + ... + 265462.

It is an arithmetic number, because the mean of its divisors is an integer number (628650).

Almost surely, 2^28929472 is an apocalyptic number.

28929472 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28929472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35204400).

28929472 is an abundant number, since it is smaller than the sum of its proper divisors (41479328).

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

28929472 is a wasteful number, since it uses less digits than its factorization.

28929472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174 (or 164 counting only the distinct ones).

The product of its digits is 145152, while the sum is 43.

The square root of 28929472 is about 5378.6124604771. The cubic root of 28929472 is about 306.9824179047.

The spelling of 28929472 in words is "twenty-eight million, nine hundred twenty-nine thousand, four hundred seventy-two".