28206441 has 32 divisors (see below), whose sum is σ = 44478720. Its totient is φ = 17626752.

The previous prime is 28206433. The next prime is 28206443. The reversal of 28206441 is 14460282.

It is not a de Polignac number, because 28206441 - 2³ = 28206433 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28206443) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32485 + ... + 33341.

It is an arithmetic number, because the mean of its divisors is an integer number (1389960).

Almost surely, 2^28206441 is an apocalyptic number.

It is an amenable number.

28206441 is a deficient number, since it is larger than the sum of its proper divisors (16272279).

28206441 is a wasteful number, since it uses less digits than its factorization.

28206441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 942 (or 936 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 28206441 is about 5310.9736395505. The cubic root of 28206441 is about 304.4033520835.

It can be divided in two parts, 2820 and 6441, that added together give a cube (9261 = 21³).

The spelling of 28206441 in words is "twenty-eight million, two hundred six thousand, four hundred forty-one".