28195408 has 10 divisors (see below), whose sum is σ = 54628634. Its totient is φ = 14097696.

The previous prime is 28195403. The next prime is 28195423. The reversal of 28195408 is 80459182.

It can be written as a sum of positive squares in only one way, i.e., 18905104 + 9290304 = 4348^2 + 3048^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28195403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 881091 + ... + 881122.

Almost surely, 2^28195408 is an apocalyptic number.

It is an amenable number.

28195408 is a deficient number, since it is larger than the sum of its proper divisors (26433226).

28195408 is a wasteful number, since it uses less digits than its factorization.

28195408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1762221 (or 1762215 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 28195408 is about 5309.9348395249. The cubic root of 28195408 is about 304.3636576018.

The spelling of 28195408 in words is "twenty-eight million, one hundred ninety-five thousand, four hundred eight".