228145028 has 6 divisors (see below), whose sum is σ = 399253806. Its totient is φ = 114072512.

The previous prime is 228145013. The next prime is 228145031. The reversal of 228145028 is 820541822.

228145028 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 159719044 + 68425984 = 12638^2 + 8272^2 .

It is a super-2 number, since 2×228145028² = 104100307602241568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 228144985 and 228145003.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28518125 + ... + 28518132.

It is an arithmetic number, because the mean of its divisors is an integer number (66542301).

Almost surely, 2^228145028 is an apocalyptic number.

It is an amenable number.

228145028 is a deficient number, since it is larger than the sum of its proper divisors (171108778).

228145028 is a wasteful number, since it uses less digits than its factorization.

228145028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57036261 (or 57036259 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 32.

The square root of 228145028 is about 15104.4704640712. The cubic root of 228145028 is about 611.0409780698.

The spelling of 228145028 in words is "two hundred twenty-eight million, one hundred forty-five thousand, twenty-eight".