28228061 has 8 divisors (see below), whose sum is σ = 29508864. Its totient is φ = 26951760.

The previous prime is 28228033. The next prime is 28228069. The reversal of 28228061 is 16082282.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28228061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28228069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22316 + ... + 23546.

It is an arithmetic number, because the mean of its divisors is an integer number (3688608).

Almost surely, 2^28228061 is an apocalyptic number.

It is an amenable number.

28228061 is a deficient number, since it is larger than the sum of its proper divisors (1280803).

28228061 is a wasteful number, since it uses less digits than its factorization.

28228061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2251.

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 28228061 is about 5313.0086580016. The cubic root of 28228061 is about 304.4811064247.

The spelling of 28228061 in words is "twenty-eight million, two hundred twenty-eight thousand, sixty-one".