228369787 has 12 divisors (see below), whose sum is σ = 235073248. Its totient is φ = 221796000.

The previous prime is 228369781. The next prime is 228369847. The reversal of 228369787 is 787963822.

It is a de Polignac number, because none of the positive numbers 2^k-228369787 is a prime.

It is a super-2 number, since 2×228369787² = 104305519228850738, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228369781) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 622078 + ... + 622444.

Almost surely, 2^228369787 is an apocalyptic number.

228369787 is a deficient number, since it is larger than the sum of its proper divisors (6703461).

228369787 is an equidigital number, since it uses as much as digits as its factorization.

228369787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630 (or 529 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 52.

The square root of 228369787 is about 15111.9087808258. The cubic root of 228369787 is about 611.2415696051.

It can be divided in two parts, 22836 and 9787, that added together give a palindrome (32623).

The spelling of 228369787 in words is "two hundred twenty-eight million, three hundred sixty-nine thousand, seven hundred eighty-seven".