228872785 has 16 divisors (see below), whose sum is σ = 300834000. Its totient is φ = 166383616.

The previous prime is 228872771. The next prime is 228872797. The reversal of 228872785 is 587278822.

It can be written as a sum of positive squares in 8 ways, for example, as 46656 + 228826129 = 216^2 + 15127^2 .

It is a cyclic number.

It is not a de Polignac number, because 228872785 - 2⁵ = 228872753 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43960 + ... + 48889.

It is an arithmetic number, because the mean of its divisors is an integer number (18802125).

Almost surely, 2^228872785 is an apocalyptic number.

It is an amenable number.

228872785 is a deficient number, since it is larger than the sum of its proper divisors (71961215).

228872785 is a wasteful number, since it uses less digits than its factorization.

228872785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92900.

The product of its digits is 1003520, while the sum is 49.

The square root of 228872785 is about 15128.5420645877. The cubic root of 228872785 is about 611.6900057998.

The spelling of 228872785 in words is "two hundred twenty-eight million, eight hundred seventy-two thousand, seven hundred eighty-five".