228724028 has 24 divisors (see below), whose sum is σ = 433332480. Its totient is φ = 105007680.

The previous prime is 228723977. The next prime is 228724049. The reversal of 228724028 is 820427822.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1583 + ... + 21446.

It is an arithmetic number, because the mean of its divisors is an integer number (18055520).

Almost surely, 2^228724028 is an apocalyptic number.

It is an amenable number.

228724028 is a deficient number, since it is larger than the sum of its proper divisors (204608452).

228724028 is a wasteful number, since it uses less digits than its factorization.

228724028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23237 (or 23235 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 35.

The square root of 228724028 is about 15123.6248300465. The cubic root of 228724028 is about 611.5574534285.

The spelling of 228724028 in words is "two hundred twenty-eight million, seven hundred twenty-four thousand, twenty-eight".