228687788 has 24 divisors (see below), whose sum is σ = 457696512. Its totient is φ = 97940304.

The previous prime is 228687773. The next prime is 228687793. The reversal of 228687788 is 887786822.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73031 + ... + 76097.

It is an arithmetic number, because the mean of its divisors is an integer number (19070688).

Almost surely, 2^228687788 is an apocalyptic number.

228687788 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

228687788 is an abundant number, since it is smaller than the sum of its proper divisors (229008724).

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

228687788 is a wasteful number, since it uses less digits than its factorization.

228687788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5741 (or 5739 counting only the distinct ones).

The product of its digits is 4816896, while the sum is 56.

The square root of 228687788 is about 15122.4266571209. The cubic root of 228687788 is about 611.5251524747.

The spelling of 228687788 in words is "two hundred twenty-eight million, six hundred eighty-seven thousand, seven hundred eighty-eight".