28030311 has 6 divisors (see below), whose sum is σ = 40488240. Its totient is φ = 18686868.

The previous prime is 28030279. The next prime is 28030319. The reversal of 28030311 is 11303082.

It is not a de Polignac number, because 28030311 - 2⁵ = 28030279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28030319) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1557231 + ... + 1557248.

It is an arithmetic number, because the mean of its divisors is an integer number (6748040).

Almost surely, 2^28030311 is an apocalyptic number.

28030311 is a deficient number, since it is larger than the sum of its proper divisors (12457929).

28030311 is a wasteful number, since it uses less digits than its factorization.

28030311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3114485 (or 3114482 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 28030311 is about 5294.3659677057. The cubic root of 28030311 is about 303.7684315392.

Adding to 28030311 its reverse (11303082), we get a palindrome (39333393).

The spelling of 28030311 in words is "twenty-eight million, thirty thousand, three hundred eleven".