228723828 has 24 divisors (see below), whose sum is σ = 550905600. Its totient is φ = 73781760.

The previous prime is 228723823. The next prime is 228723839. The reversal of 228723828 is 828327822.

228723828 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

228723828 is strictly pandigital in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 228723828.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228723821) 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, 307053 + ... + 307796.

It is an arithmetic number, because the mean of its divisors is an integer number (22954400).

Almost surely, 2^228723828 is an apocalyptic number.

It is an amenable number.

228723828 is an abundant number, since it is smaller than the sum of its proper divisors (322181772).

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

228723828 is a wasteful number, since it uses less digits than its factorization.

228723828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614887 (or 614885 counting only the distinct ones).

The product of its digits is 172032, while the sum is 42.

The square root of 228723828 is about 15123.6182178737. The cubic root of 228723828 is about 611.5572751765.

The spelling of 228723828 in words is "two hundred twenty-eight million, seven hundred twenty-three thousand, eight hundred twenty-eight".