28195776 has 252 divisors, whose sum is σ = 100129848. Its totient is φ = 7838208.

The previous prime is 28195763. The next prime is 28195781. The reversal of 28195776 is 67759182.

It is a tau number, because it is divible by the number of its divisors (252).

Its product of digits (211680) is a multiple of the sum of its prime divisors (49).

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 35 ways as a sum of consecutive naturals, for example, 762030 + ... + 762066.

Almost surely, 2^28195776 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 28195776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50064924).

28195776 is an abundant number, since it is smaller than the sum of its proper divisors (71934072).

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

28195776 is an equidigital number, since it uses as much as digits as its factorization.

28195776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78 (or 49 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 28195776 is about 5309.9694914378. The cubic root of 28195776 is about 304.3649817576.

The spelling of 28195776 in words is "twenty-eight million, one hundred ninety-five thousand, seven hundred seventy-six".