28760928 has 96 divisors (see below), whose sum is σ = 87220224. Its totient is φ = 8128512.

The previous prime is 28760917. The next prime is 28760929. The reversal of 28760928 is 82906782.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 28760928.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28760929) 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, 85176 + ... + 85512.

It is an arithmetic number, because the mean of its divisors is an integer number (908544).

Almost surely, 2^28760928 is an apocalyptic number.

28760928 is a gapful number since it is divisible by the number (28) 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 28760928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43610112).

28760928 is an abundant number, since it is smaller than the sum of its proper divisors (58459296).

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

28760928 is a wasteful number, since it uses less digits than its factorization.

28760928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484 (or 476 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 28760928 is about 5362.9215918191. The cubic root of 28760928 is about 306.3850933627.

The spelling of 28760928 in words is "twenty-eight million, seven hundred sixty thousand, nine hundred twenty-eight".