228931998 has 8 divisors (see below), whose sum is σ = 457864008. Its totient is φ = 76310664.

The previous prime is 228931991. The next prime is 228931999. The reversal of 228931998 is 899139822.

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

228931998 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 228931998.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228931991) 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, 19077661 + ... + 19077672.

It is an arithmetic number, because the mean of its divisors is an integer number (57233001).

Almost surely, 2^228931998 is an apocalyptic number.

228931998 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

228931998 is a wasteful number, since it uses less digits than its factorization.

228931998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38155338.

The product of its digits is 559872, while the sum is 51.

The square root of 228931998 is about 15130.4989342718. The cubic root of 228931998 is about 611.7427525359.

The spelling of 228931998 in words is "two hundred twenty-eight million, nine hundred thirty-one thousand, nine hundred ninety-eight".