28856828 has 48 divisors (see below), whose sum is σ = 67812864. Its totient is φ = 10376640.

The previous prime is 28856819. The next prime is 28856831. The reversal of 28856828 is 82865882.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 401 + ... + 7607.

It is an arithmetic number, because the mean of its divisors is an integer number (1412768).

Almost surely, 2^28856828 is an apocalyptic number.

28856828 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 28856828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33906432).

28856828 is an abundant number, since it is smaller than the sum of its proper divisors (38956036).

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

28856828 is a wasteful number, since it uses less digits than its factorization.

28856828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7242 (or 7240 counting only the distinct ones).

The product of its digits is 491520, while the sum is 47.

The square root of 28856828 is about 5371.8551730291. The cubic root of 28856828 is about 306.7252508324.

The spelling of 28856828 in words is "twenty-eight million, eight hundred fifty-six thousand, eight hundred twenty-eight".