228404529 has 20 divisors (see below), whose sum is σ = 359157040. Its totient is φ = 144254520.

The previous prime is 228404521. The next prime is 228404543. The reversal of 228404529 is 925404822.

228404529 is a `hidden beast` number, since 228 + 404 + 5 + 29 = 666.

It is not a de Polignac number, because 228404529 - 2³ = 228404521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 228404493 and 228404502.

It is not an unprimeable number, because it can be changed into a prime (228404521) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 72667 + ... + 75744.

It is an arithmetic number, because the mean of its divisors is an integer number (17957852).

Almost surely, 2^228404529 is an apocalyptic number.

It is an amenable number.

228404529 is a deficient number, since it is larger than the sum of its proper divisors (130752511).

228404529 is a wasteful number, since it uses less digits than its factorization.

228404529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148442 (or 148433 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 228404529 is about 15113.0582279034. The cubic root of 228404529 is about 611.2725641864.

The spelling of 228404529 in words is "two hundred twenty-eight million, four hundred four thousand, five hundred twenty-nine".