228929809 has 8 divisors (see below), whose sum is σ = 234067968. Its totient is φ = 223802880.

The previous prime is 228929783. The next prime is 228929839. The reversal of 228929809 is 908929822.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 228929809 - 2⁷ = 228929681 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (228929839) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48849 + ... + 53329.

It is an arithmetic number, because the mean of its divisors is an integer number (29258496).

Almost surely, 2^228929809 is an apocalyptic number.

It is an amenable number.

228929809 is a deficient number, since it is larger than the sum of its proper divisors (5138159).

228929809 is a wasteful number, since it uses less digits than its factorization.

228929809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5615.

The product of its (nonzero) digits is 373248, while the sum is 49.

The square root of 228929809 is about 15130.4265967619. The cubic root of 228929809 is about 611.7408027442.

The spelling of 228929809 in words is "two hundred twenty-eight million, nine hundred twenty-nine thousand, eight hundred nine".