228328705 has 16 divisors (see below), whose sum is σ = 311900544. Its totient is φ = 158836480.

The previous prime is 228328703. The next prime is 228328741. The reversal of 228328705 is 507823822.

It is not a de Polignac number, because 228328705 - 2¹ = 228328703 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228328703) 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, 88984 + ... + 91513.

It is an arithmetic number, because the mean of its divisors is an integer number (19493784).

Almost surely, 2^228328705 is an apocalyptic number.

It is an amenable number.

228328705 is a deficient number, since it is larger than the sum of its proper divisors (83571839).

228328705 is a wasteful number, since it uses less digits than its factorization.

228328705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180536.

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 228328705 is about 15110.5494605590. The cubic root of 228328705 is about 611.2049148263.

The spelling of 228328705 in words is "two hundred twenty-eight million, three hundred twenty-eight thousand, seven hundred five".