28100048 has 60 divisors (see below), whose sum is σ = 59386080. Its totient is φ = 12873216.

The previous prime is 28100041. The next prime is 28100141. The reversal of 28100048 is 84000182.

It is a super-2 number, since 2×28100048² = 1579225395204608, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28099996 and 28100032.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28100041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 272765 + ... + 272867.

It is an arithmetic number, because the mean of its divisors is an integer number (989768).

Almost surely, 2^28100048 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 28100048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29693040).

28100048 is an abundant number, since it is smaller than the sum of its proper divisors (31286032).

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

28100048 is a wasteful number, since it uses less digits than its factorization.

28100048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204 (or 181 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 28100048 is about 5300.9478397736. The cubic root of 28100048 is about 304.0201394783.

The spelling of 28100048 in words is "twenty-eight million, one hundred thousand, forty-eight".