228840937 has 4 divisors (see below), whose sum is σ = 246444100. Its totient is φ = 211237776.

The previous prime is 228840923. The next prime is 228840947. The reversal of 228840937 is 739048822.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 62663056 + 166177881 = 7916^2 + 12891^2 .

It is a cyclic number.

It is not a de Polignac number, because 228840937 - 2⁷ = 228840809 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 228840893 and 228840902.

It is not an unprimeable number, because it can be changed into a prime (228840947) 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, 8801562 + ... + 8801587.

It is an arithmetic number, because the mean of its divisors is an integer number (61611025).

Almost surely, 2^228840937 is an apocalyptic number.

It is an amenable number.

228840937 is a deficient number, since it is larger than the sum of its proper divisors (17603163).

228840937 is a wasteful number, since it uses less digits than its factorization.

228840937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17603162.

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 228840937 is about 15127.4894480214. The cubic root of 228840937 is about 611.6616319486.

The spelling of 228840937 in words is "two hundred twenty-eight million, eight hundred forty thousand, nine hundred thirty-seven".