28190448 has 180 divisors, whose sum is σ = 95259528. Its totient is φ = 7672320.

The previous prime is 28190443. The next prime is 28190453. The reversal of 28190448 is 84409182.

28190448 is a `hidden beast` number, since 28 + 190 + 448 = 666.

It is an interprime number because it is at equal distance from previous prime (28190443) and next prime (28190453).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28190443) 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 35 ways as a sum of consecutive naturals, for example, 761886 + ... + 761922.

Almost surely, 2^28190448 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 28190448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47629764).

28190448 is an abundant number, since it is smaller than the sum of its proper divisors (67069080).

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

28190448 is a wasteful number, since it uses less digits than its factorization.

28190448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112 (or 66 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 28190448 is about 5309.4677699370. The cubic root of 28190448 is about 304.3458091603.

The spelling of 28190448 in words is "twenty-eight million, one hundred ninety thousand, four hundred forty-eight".