28193648 has 40 divisors (see below), whose sum is σ = 62912640. Its totient is φ = 11989440.

The previous prime is 28193647. The next prime is 28193657. The reversal of 28193648 is 84639182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28193647) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 14663 + ... + 16473.

It is an arithmetic number, because the mean of its divisors is an integer number (1572816).

Almost surely, 2^28193648 is an apocalyptic number.

28193648 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 28193648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31456320).

28193648 is an abundant number, since it is smaller than the sum of its proper divisors (34718992).

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

28193648 is a wasteful number, since it uses less digits than its factorization.

28193648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1965 (or 1959 counting only the distinct ones).

The product of its digits is 82944, while the sum is 41.

The square root of 28193648 is about 5309.7691098578. The cubic root of 28193648 is about 304.3573245234.

The spelling of 28193648 in words is "twenty-eight million, one hundred ninety-three thousand, six hundred forty-eight".