228025779 has 4 divisors (see below), whose sum is σ = 304034376. Its totient is φ = 152017184.

The previous prime is 228025673. The next prime is 228025799. The reversal of 228025779 is 977520822.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228025779 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 228025779.

It is not an unprimeable number, because it can be changed into a prime (228025799) 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 3 ways as a sum of consecutive naturals, for example, 38004294 + ... + 38004299.

It is an arithmetic number, because the mean of its divisors is an integer number (76008594).

Almost surely, 2^228025779 is an apocalyptic number.

228025779 is a deficient number, since it is larger than the sum of its proper divisors (76008597).

228025779 is an equidigital number, since it uses as much as digits as its factorization.

228025779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76008596.

The product of its (nonzero) digits is 141120, while the sum is 42.

The square root of 228025779 is about 15100.5224744047. The cubic root of 228025779 is about 610.9344979573.

The spelling of 228025779 in words is "two hundred twenty-eight million, twenty-five thousand, seven hundred seventy-nine".