28370328 has 64 divisors (see below), whose sum is σ = 82805760. Its totient is φ = 7931136.

The previous prime is 28370291. The next prime is 28370347. The reversal of 28370328 is 82307382.

It is a happy number.

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, 6100 + ... + 9692.

It is an arithmetic number, because the mean of its divisors is an integer number (1293840).

Almost surely, 2^28370328 is an apocalyptic number.

28370328 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 28370328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41402880).

28370328 is an abundant number, since it is smaller than the sum of its proper divisors (54435432).

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

28370328 is a wasteful number, since it uses less digits than its factorization.

28370328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3656 (or 3652 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 28370328 is about 5326.3803844637. The cubic root of 28370328 is about 304.9917690155.

The spelling of 28370328 in words is "twenty-eight million, three hundred seventy thousand, three hundred twenty-eight".