228089787 has 4 divisors (see below), whose sum is σ = 304119720. Its totient is φ = 152059856.

The previous prime is 228089779. The next prime is 228089819. The reversal of 228089787 is 787980822.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 228089787 - 2³ = 228089779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (228089747) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38014962 + ... + 38014967.

It is an arithmetic number, because the mean of its divisors is an integer number (76029930).

Almost surely, 2^228089787 is an apocalyptic number.

228089787 is a deficient number, since it is larger than the sum of its proper divisors (76029933).

228089787 is an equidigital number, since it uses as much as digits as its factorization.

228089787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76029932.

The product of its (nonzero) digits is 903168, while the sum is 51.

The square root of 228089787 is about 15102.6417225597. The cubic root of 228089787 is about 610.9916567533.

The spelling of 228089787 in words is "two hundred twenty-eight million, eighty-nine thousand, seven hundred eighty-seven".