228399653 has 4 divisors (see below), whose sum is σ = 229179468. Its totient is φ = 227619840.

The previous prime is 228399629. The next prime is 228399671. The reversal of 228399653 is 356993822.

It is a happy number.

228399653 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 125843524 + 102556129 = 11218^2 + 10127^2 .

It is a cyclic number.

It is not a de Polignac number, because 228399653 - 2¹⁰ = 228398629 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 228399598 and 228399607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228399623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 389468 + ... + 390053.

It is an arithmetic number, because the mean of its divisors is an integer number (57294867).

Almost surely, 2^228399653 is an apocalyptic number.

It is an amenable number.

228399653 is a deficient number, since it is larger than the sum of its proper divisors (779815).

228399653 is an equidigital number, since it uses as much as digits as its factorization.

228399653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 779814.

The product of its digits is 699840, while the sum is 47.

The square root of 228399653 is about 15112.8969095935. The cubic root of 228399653 is about 611.2682143220.

The spelling of 228399653 in words is "two hundred twenty-eight million, three hundred ninety-nine thousand, six hundred fifty-three".