228391900 has 36 divisors (see below), whose sum is σ = 540668520. Its totient is φ = 83051200.

The previous prime is 228391897. The next prime is 228391901. The reversal of 228391900 is 9193822.

It is a super-2 number, since 2×228391900² = 104325719971220000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228391901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 102715 + ... + 104914.

It is an arithmetic number, because the mean of its divisors is an integer number (15018570).

Almost surely, 2^228391900 is an apocalyptic number.

228391900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228391900 is an abundant number, since it is smaller than the sum of its proper divisors (312276620).

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

228391900 is a wasteful number, since it uses less digits than its factorization.

228391900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207654 (or 207647 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 228391900 is about 15112.6404046414. The cubic root of 228391900 is about 611.2612977672.

The spelling of 228391900 in words is "two hundred twenty-eight million, three hundred ninety-one thousand, nine hundred".