228697329 has 16 divisors (see below), whose sum is σ = 348904448. Its totient is φ = 130529232.

The previous prime is 228697321. The next prime is 228697373. The reversal of 228697329 is 923796822.

228697329 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 228697329 - 2³ = 228697321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228697321) 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, 13044 + ... + 25050.

It is an arithmetic number, because the mean of its divisors is an integer number (21806528).

Almost surely, 2^228697329 is an apocalyptic number.

It is an amenable number.

228697329 is a deficient number, since it is larger than the sum of its proper divisors (120207119).

228697329 is a wasteful number, since it uses less digits than its factorization.

228697329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12924.

The product of its digits is 653184, while the sum is 48.

The square root of 228697329 is about 15122.7421124610. The cubic root of 228697329 is about 611.5336567626.

The spelling of 228697329 in words is "two hundred twenty-eight million, six hundred ninety-seven thousand, three hundred twenty-nine".