28348428 has 54 divisors (see below), whose sum is σ = 69822844. Its totient is φ = 8951488.

The previous prime is 28348427. The next prime is 28348447. The reversal of 28348428 is 82484382.

It is not an unprimeable number, because it can be changed into a prime (28348421) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 534850 + ... + 534902.

Almost surely, 2^28348428 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 28348428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34911422).

28348428 is an abundant number, since it is smaller than the sum of its proper divisors (41474416).

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

28348428 is a wasteful number, since it uses less digits than its factorization.

28348428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171 (or 87 counting only the distinct ones).

The product of its digits is 98304, while the sum is 39.

The square root of 28348428 is about 5324.3241824667. The cubic root of 28348428 is about 304.9132710494.

The spelling of 28348428 in words is "twenty-eight million, three hundred forty-eight thousand, four hundred twenty-eight".