228036645 has 12 divisors (see below), whose sum is σ = 395263596. Its totient is φ = 121619520.

The previous prime is 228036643. The next prime is 228036647. The reversal of 228036645 is 546630822.

228036645 is a `hidden beast` number, since 2 + 2 + 8 + 0 + 3 + 6 + 645 = 666.

It is an interprime number because it is at equal distance from previous prime (228036643) and next prime (228036647).

It can be written as a sum of positive squares in 2 ways, for example, as 70257924 + 157778721 = 8382^2 + 12561^2 .

It is not a de Polignac number, because 228036645 - 2¹ = 228036643 is a prime.

It is a super-3 number, since 3×228036645³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228036643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2533696 + ... + 2533785.

It is an arithmetic number, because the mean of its divisors is an integer number (32938633).

Almost surely, 2^228036645 is an apocalyptic number.

It is an amenable number.

228036645 is a deficient number, since it is larger than the sum of its proper divisors (167226951).

228036645 is a wasteful number, since it uses less digits than its factorization.

228036645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5067492 (or 5067489 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 228036645 is about 15100.8822589940. The cubic root of 228036645 is about 610.9442019900.

The spelling of 228036645 in words is "two hundred twenty-eight million, thirty-six thousand, six hundred forty-five".