228736129 has 4 divisors (see below), whose sum is σ = 228766384. Its totient is φ = 228705876.

The previous prime is 228736103. The next prime is 228736199. The reversal of 228736129 is 921637822.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 228736129 - 2¹³ = 228727937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 228736091 and 228736100.

It is not an unprimeable number, because it can be changed into a prime (228736199) 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, 7114 + ... + 22540.

It is an arithmetic number, because the mean of its divisors is an integer number (57191596).

Almost surely, 2^228736129 is an apocalyptic number.

It is an amenable number.

228736129 is a deficient number, since it is larger than the sum of its proper divisors (30255).

228736129 is a wasteful number, since it uses less digits than its factorization.

228736129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30254.

The product of its digits is 72576, while the sum is 40.

The square root of 228736129 is about 15124.0248941874. The cubic root of 228736129 is about 611.5682383706.

It can be divided in two parts, 2287 and 36129, that added together give a 4-th power (38416 = 14⁴).

The spelling of 228736129 in words is "two hundred twenty-eight million, seven hundred thirty-six thousand, one hundred twenty-nine".