228385772 has 6 divisors (see below), whose sum is σ = 399675108. Its totient is φ = 114192884.

The previous prime is 228385739. The next prime is 228385823. The reversal of 228385772 is 277583822.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28548218 + ... + 28548225.

It is an arithmetic number, because the mean of its divisors is an integer number (66612518).

Almost surely, 2^228385772 is an apocalyptic number.

It is an amenable number.

228385772 is a deficient number, since it is larger than the sum of its proper divisors (171289336).

228385772 is a wasteful number, since it uses less digits than its factorization.

228385772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57096447 (or 57096445 counting only the distinct ones).

The product of its digits is 376320, while the sum is 44.

The square root of 228385772 is about 15112.4376590939. The cubic root of 228385772 is about 611.2558307859.

The spelling of 228385772 in words is "two hundred twenty-eight million, three hundred eighty-five thousand, seven hundred seventy-two".