228985399 has 4 divisors (see below), whose sum is σ = 232739320. Its totient is φ = 225231480.

The previous prime is 228985391. The next prime is 228985409. The reversal of 228985399 is 993589822.

228985399 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 228985399 - 2³ = 228985391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228985391) 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, 1876869 + ... + 1876990.

It is an arithmetic number, because the mean of its divisors is an integer number (58184830).

Almost surely, 2^228985399 is an apocalyptic number.

228985399 is a deficient number, since it is larger than the sum of its proper divisors (3753921).

228985399 is an equidigital number, since it uses as much as digits as its factorization.

228985399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3753920.

The product of its digits is 2799360, while the sum is 55.

The square root of 228985399 is about 15132.2635121121. The cubic root of 228985399 is about 611.7903141631.

The spelling of 228985399 in words is "two hundred twenty-eight million, nine hundred eighty-five thousand, three hundred ninety-nine".