228689745 has 8 divisors (see below), whose sum is σ = 365903616. Its totient is φ = 121967856.

The previous prime is 228689743. The next prime is 228689761. The reversal of 228689745 is 547986822.

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

It is not a de Polignac number, because 228689745 - 2¹ = 228689743 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (228689743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7622977 + ... + 7623006.

It is an arithmetic number, because the mean of its divisors is an integer number (45737952).

Almost surely, 2^228689745 is an apocalyptic number.

It is an amenable number.

228689745 is a deficient number, since it is larger than the sum of its proper divisors (137213871).

228689745 is a wasteful number, since it uses less digits than its factorization.

228689745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15245991.

The product of its digits is 1935360, while the sum is 51.

The square root of 228689745 is about 15122.4913622062. The cubic root of 228689745 is about 611.5268968490.

The spelling of 228689745 in words is "two hundred twenty-eight million, six hundred eighty-nine thousand, seven hundred forty-five".