228052728 has 48 divisors (see below), whose sum is σ = 644501520. Its totient is φ = 72711936.

The previous prime is 228052691. The next prime is 228052729. The reversal of 228052728 is 827250822.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 228052692 and 228052701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228052729) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67201 + ... + 70512.

It is an arithmetic number, because the mean of its divisors is an integer number (13427115).

Almost surely, 2^228052728 is an apocalyptic number.

It is an amenable number.

228052728 is an abundant number, since it is smaller than the sum of its proper divisors (416448792).

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

228052728 is a wasteful number, since it uses less digits than its factorization.

228052728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137748 (or 137741 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 228052728 is about 15101.4147681600. The cubic root of 228052728 is about 610.9585645713.

The spelling of 228052728 in words is "two hundred twenty-eight million, fifty-two thousand, seven hundred twenty-eight".