228629 has 4 divisors (see below), whose sum is σ = 231084. Its totient is φ = 226176.

The previous prime is 228619. The next prime is 228637. The reversal of 228629 is 926822.

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 70225 + 158404 = 265^2 + 398^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1082 + ... + 1275.

It is an arithmetic number, because the mean of its divisors is an integer number (57771).

2²²⁸⁶²⁹ is an apocalyptic number.

It is an amenable number.

228629 is a deficient number, since it is larger than the sum of its proper divisors (2455).

228629 is an equidigital number, since it uses as much as digits as its factorization.

228629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2454.

The product of its digits is 3456, while the sum is 29.

The square root of 228629 is about 478.1516495841. The cubic root of 228629 is about 61.1472747080.

The spelling of 228629 in words is "two hundred twenty-eight thousand, six hundred twenty-nine".