28897848 has 72 divisors (see below), whose sum is σ = 91054080. Its totient is φ = 8255520.

The previous prime is 28897801. The next prime is 28897873. The reversal of 28897848 is 84879882.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×28897848² = 1670171238062208, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 28897794 and 28897803.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 568 + ... + 7623.

It is an arithmetic number, because the mean of its divisors is an integer number (1264640).

Almost surely, 2^28897848 is an apocalyptic number.

28897848 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 28897848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45527040).

28897848 is an abundant number, since it is smaller than the sum of its proper divisors (62156232).

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

28897848 is a wasteful number, since it uses less digits than its factorization.

28897848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8217 (or 8203 counting only the distinct ones).

The product of its digits is 2064384, while the sum is 54.

The square root of 28897848 is about 5375.6718649858. The cubic root of 28897848 is about 306.8705187367.

The spelling of 28897848 in words is "twenty-eight million, eight hundred ninety-seven thousand, eight hundred forty-eight".