28030396 has 24 divisors (see below), whose sum is σ = 51932160. Its totient is φ = 13201200.

The previous prime is 28030393. The next prime is 28030397. The reversal of 28030396 is 69303082.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28030393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13551 + ... + 15481.

It is an arithmetic number, because the mean of its divisors is an integer number (2163840).

Almost surely, 2^28030396 is an apocalyptic number.

It is an amenable number.

28030396 is a deficient number, since it is larger than the sum of its proper divisors (23901764).

28030396 is a wasteful number, since it uses less digits than its factorization.

28030396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2145 (or 2143 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 28030396 is about 5294.3739951008. The cubic root of 28030396 is about 303.7687385912.

The spelling of 28030396 in words is "twenty-eight million, thirty thousand, three hundred ninety-six".