228736649 has 8 divisors (see below), whose sum is σ = 254939040. Its totient is φ = 203950656.

The previous prime is 228736643. The next prime is 228736657. The reversal of 228736649 is 946637822.

228736649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 228736649 - 2²⁰ = 227688073 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (228736643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 353759 + ... + 354404.

It is an arithmetic number, because the mean of its divisors is an integer number (31867380).

Almost surely, 2^228736649 is an apocalyptic number.

It is an amenable number.

228736649 is a deficient number, since it is larger than the sum of its proper divisors (26202391).

228736649 is a wasteful number, since it uses less digits than its factorization.

228736649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708199.

The product of its digits is 870912, while the sum is 47.

The square root of 228736649 is about 15124.0420853686. The cubic root of 228736649 is about 611.5687018089.

The spelling of 228736649 in words is "two hundred twenty-eight million, seven hundred thirty-six thousand, six hundred forty-nine".