228870109 has 18 divisors (see below), whose sum is σ = 253594446. Its totient is φ = 206406720.

The previous prime is 228870107. The next prime is 228870127. The reversal of 228870109 is 901078822.

It can be written as a sum of positive squares in 9 ways, for example, as 228312100 + 558009 = 15110^2 + 747^2 .

It is not a de Polignac number, because 228870109 - 2¹ = 228870107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228870107) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1535967 + ... + 1536115.

Almost surely, 2^228870109 is an apocalyptic number.

It is an amenable number.

228870109 is a deficient number, since it is larger than the sum of its proper divisors (24724337).

228870109 is an equidigital number, since it uses as much as digits as its factorization.

228870109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385 (or 223 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 228870109 is about 15128.4536222312. The cubic root of 228870109 is about 611.6876218133.

The spelling of 228870109 in words is "two hundred twenty-eight million, eight hundred seventy thousand, one hundred nine".