228469 has 2 divisors, whose sum is σ = 228470. Its totient is φ = 228468.

The previous prime is 228461. The next prime is 228479. The reversal of 228469 is 964822.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 220900 + 7569 = 470^2 + 87^2 .

It is a cyclic number.

It is not a de Polignac number, because 228469 - 2³ = 228461 is a prime.

It is a super-2 number, since 2×228469² = 104396167922, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 228469.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114234 + 114235.

It is an arithmetic number, because the mean of its divisors is an integer number (114235).

2²²⁸⁴⁶⁹ is an apocalyptic number.

It is an amenable number.

228469 is a deficient number, since it is larger than the sum of its proper divisors (1).

228469 is an equidigital number, since it uses as much as digits as its factorization.

228469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 31.

The square root of 228469 is about 477.9843093659. The cubic root of 228469 is about 61.1330072746.

The spelling of 228469 in words is "two hundred twenty-eight thousand, four hundred sixty-nine".