28240611 has 12 divisors (see below), whose sum is σ = 43801992. Its totient is φ = 16137408.

The previous prime is 28240603. The next prime is 28240613. The reversal of 28240611 is 11604282.

It is not a de Polignac number, because 28240611 - 2³ = 28240603 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28240613) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95910 + ... + 96203.

It is an arithmetic number, because the mean of its divisors is an integer number (3650166).

Almost surely, 2^28240611 is an apocalyptic number.

28240611 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

28240611 is a deficient number, since it is larger than the sum of its proper divisors (15561381).

28240611 is a wasteful number, since it uses less digits than its factorization.

28240611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192130 (or 192123 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 28240611 is about 5314.1895901445. The cubic root of 28240611 is about 304.5262231347.

Adding to 28240611 its reverse (11604282), we get a palindrome (39844893).

The spelling of 28240611 in words is "twenty-eight million, two hundred forty thousand, six hundred eleven".