28148211 has 24 divisors (see below), whose sum is σ = 50042720. Its totient is φ = 14846976.

The previous prime is 28148207. The next prime is 28148213. The reversal of 28148211 is 11284182.

It is not a de Polignac number, because 28148211 - 2² = 28148207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28148213) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16366 + ... + 18003.

Almost surely, 2^28148211 is an apocalyptic number.

28148211 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

28148211 is a deficient number, since it is larger than the sum of its proper divisors (21894509).

28148211 is a wasteful number, since it uses less digits than its factorization.

28148211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34395 (or 34392 counting only the distinct ones).

The product of its digits is 1024, while the sum is 27.

The square root of 28148211 is about 5305.4887616505. The cubic root of 28148211 is about 304.1937354363.

It can be divided in two parts, 2814 and 8211, that added together give a square (11025 = 105²).

The spelling of 28148211 in words is "twenty-eight million, one hundred forty-eight thousand, two hundred eleven".