228689709 has 8 divisors (see below), whose sum is σ = 307769760. Its totient is φ = 151034736.

The previous prime is 228689701. The next prime is 228689717. The reversal of 228689709 is 907986822.

It is a happy number.

228689709 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (228689701) and next prime (228689717).

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

It is not a de Polignac number, because 228689709 - 2³ = 228689701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228689701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 355894 + ... + 356535.

It is an arithmetic number, because the mean of its divisors is an integer number (38471220).

Almost surely, 2^228689709 is an apocalyptic number.

It is an amenable number.

228689709 is a deficient number, since it is larger than the sum of its proper divisors (79080051).

228689709 is a wasteful number, since it uses less digits than its factorization.

228689709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712539.

The product of its (nonzero) digits is 870912, while the sum is 51.

The square root of 228689709 is about 15122.4901719261. The cubic root of 228689709 is about 611.5268647605.

The spelling of 228689709 in words is "two hundred twenty-eight million, six hundred eighty-nine thousand, seven hundred nine".