229778 has 4 divisors (see below), whose sum is σ = 344670. Its totient is φ = 114888.

The previous prime is 229777. The next prime is 229781. The reversal of 229778 is 877922.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 877922 = 2 ⋅438961.

It can be written as a sum of positive squares in only one way, i.e., 190969 + 38809 = 437^2 + 197^2 .

It is not an unprimeable number, because it can be changed into a prime (229771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57443 + ... + 57446.

2²²⁹⁷⁷⁸ is an apocalyptic number.

229778 is a deficient number, since it is larger than the sum of its proper divisors (114892).

229778 is a wasteful number, since it uses less digits than its factorization.

229778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114891.

The product of its digits is 14112, while the sum is 35.

The square root of 229778 is about 479.3516454546. The cubic root of 229778 is about 61.2495376891.

The spelling of 229778 in words is "two hundred twenty-nine thousand, seven hundred seventy-eight".