28278741 has 8 divisors (see below), whose sum is σ = 39005280. Its totient is φ = 18202352.

The previous prime is 28278739. The next prime is 28278743. The reversal of 28278741 is 14787282.

It is an interprime number because it is at equal distance from previous prime (28278739) and next prime (28278743).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28278741 - 2¹ = 28278739 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28278741.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28278743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162435 + ... + 162608.

It is an arithmetic number, because the mean of its divisors is an integer number (4875660).

Almost surely, 2^28278741 is an apocalyptic number.

It is an amenable number.

28278741 is a deficient number, since it is larger than the sum of its proper divisors (10726539).

28278741 is a wasteful number, since it uses less digits than its factorization.

28278741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325075.

The product of its digits is 50176, while the sum is 39.

The square root of 28278741 is about 5317.7759448852. The cubic root of 28278741 is about 304.6632168997.

The spelling of 28278741 in words is "twenty-eight million, two hundred seventy-eight thousand, seven hundred forty-one".