28118541 has 16 divisors (see below), whose sum is σ = 40995648. Its totient is φ = 17001600.

The previous prime is 28118509. The next prime is 28118551. The reversal of 28118541 is 14581182.

It is a happy number.

It is not a de Polignac number, because 28118541 - 2⁵ = 28118509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28118499 and 28118508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28118551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19671 + ... + 21051.

It is an arithmetic number, because the mean of its divisors is an integer number (2562228).

Almost surely, 2^28118541 is an apocalyptic number.

It is an amenable number.

28118541 is a deficient number, since it is larger than the sum of its proper divisors (12877107).

28118541 is a wasteful number, since it uses less digits than its factorization.

28118541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2012.

The product of its digits is 2560, while the sum is 30.

The square root of 28118541 is about 5302.6918635727. The cubic root of 28118541 is about 304.0868180303.

The spelling of 28118541 in words is "twenty-eight million, one hundred eighteen thousand, five hundred forty-one".