228945749 has 32 divisors (see below), whose sum is σ = 266768640. Its totient is φ = 195148800.

The previous prime is 228945733. The next prime is 228945781. The reversal of 228945749 is 947549822.

It is a cyclic number.

It is not a de Polignac number, because 228945749 - 2⁴ = 228945733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 228945697 and 228945706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228945709) 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 31 ways as a sum of consecutive naturals, for example, 691514 + ... + 691844.

It is an arithmetic number, because the mean of its divisors is an integer number (8336520).

Almost surely, 2^228945749 is an apocalyptic number.

228945749 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

228945749 is a deficient number, since it is larger than the sum of its proper divisors (37822891).

228945749 is a wasteful number, since it uses less digits than its factorization.

228945749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461.

The product of its digits is 1451520, while the sum is 50.

The square root of 228945749 is about 15130.9533407515. The cubic root of 228945749 is about 611.7550005779.

The spelling of 228945749 in words is "two hundred twenty-eight million, nine hundred forty-five thousand, seven hundred forty-nine".