228437329 has 4 divisors (see below), whose sum is σ = 229306176. Its totient is φ = 227568484.

The previous prime is 228437303. The next prime is 228437351. The reversal of 228437329 is 923734822.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 228437329 - 2⁷ = 228437201 is a prime.

It is a super-2 number, since 2×228437329² = 104367226561308482, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 228437291 and 228437300.

It is not an unprimeable number, because it can be changed into a prime (228437369) 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, 434029 + ... + 434554.

It is an arithmetic number, because the mean of its divisors is an integer number (57326544).

Almost surely, 2^228437329 is an apocalyptic number.

It is an amenable number.

228437329 is a deficient number, since it is larger than the sum of its proper divisors (868847).

228437329 is an equidigital number, since it uses as much as digits as its factorization.

228437329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868846.

The product of its digits is 145152, while the sum is 40.

The square root of 228437329 is about 15114.1433432398. The cubic root of 228437329 is about 611.3018233558.

The spelling of 228437329 in words is "two hundred twenty-eight million, four hundred thirty-seven thousand, three hundred twenty-nine".