28718141 has 4 divisors (see below), whose sum is σ = 28824384. Its totient is φ = 28611900.

The previous prime is 28718119. The next prime is 28718147. The reversal of 28718141 is 14181782.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28718141 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28718098 and 28718107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28718147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52715 + ... + 53256.

It is an arithmetic number, because the mean of its divisors is an integer number (7206096).

Almost surely, 2^28718141 is an apocalyptic number.

It is an amenable number.

28718141 is a deficient number, since it is larger than the sum of its proper divisors (106243).

28718141 is a wasteful number, since it uses less digits than its factorization.

28718141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106242.

The product of its digits is 3584, while the sum is 32.

The square root of 28718141 is about 5358.9309568234. The cubic root of 28718141 is about 306.2330838359.

The spelling of 28718141 in words is "twenty-eight million, seven hundred eighteen thousand, one hundred forty-one".