228137886 has 12 divisors (see below), whose sum is σ = 494298792. Its totient is φ = 76045956.

The previous prime is 228137869. The next prime is 228137887. The reversal of 228137886 is 688731822.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228137887) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6337146 + ... + 6337181.

It is an arithmetic number, because the mean of its divisors is an integer number (41191566).

Almost surely, 2^228137886 is an apocalyptic number.

228137886 is an abundant number, since it is smaller than the sum of its proper divisors (266160906).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

228137886 is a wasteful number, since it uses less digits than its factorization.

228137886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12674335 (or 12674332 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 228137886 is about 15104.2340421486. The cubic root of 228137886 is about 611.0346018621.

The spelling of 228137886 in words is "two hundred twenty-eight million, one hundred thirty-seven thousand, eight hundred eighty-six".