228965 has 16 divisors (see below), whose sum is σ = 314496. Its totient is φ = 158400.

The previous prime is 228961. The next prime is 228983. The reversal of 228965 is 569822.

It is not a de Polignac number, because 228965 - 2² = 228961 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 (228961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1175 + ... + 1355.

It is an arithmetic number, because the mean of its divisors is an integer number (19656).

2²²⁸⁹⁶⁵ is an apocalyptic number.

It is an amenable number.

228965 is a deficient number, since it is larger than the sum of its proper divisors (85531).

228965 is a wasteful number, since it uses less digits than its factorization.

228965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220.

The product of its digits is 8640, while the sum is 32.

The square root of 228965 is about 478.5028735546. The cubic root of 228965 is about 61.1772146657.

It can be divided in two parts, 2289 and 65, that multiplied together give a triangular number (148785 = T₅₄₅).

The spelling of 228965 in words is "two hundred twenty-eight thousand, nine hundred sixty-five".