228506840 has 48 divisors (see below), whose sum is σ = 537516000. Its totient is φ = 87420608.

The previous prime is 228506833. The next prime is 228506851. The reversal of 228506840 is 48605822.

It is a self number, because there is not a number n which added to its sum of digits gives 228506840.

It is a congruent number.

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 in 11 ways as a sum of consecutive naturals, for example, 15761 + ... + 26559.

It is an arithmetic number, because the mean of its divisors is an integer number (11198250).

Almost surely, 2^228506840 is an apocalyptic number.

228506840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 228506840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (268758000).

228506840 is an abundant number, since it is smaller than the sum of its proper divisors (309009160).

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

228506840 is a wasteful number, since it uses less digits than its factorization.

228506840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10856 (or 10829 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 35.

The square root of 228506840 is about 15116.4427032288. The cubic root of 228506840 is about 611.3638212380.

The spelling of 228506840 in words is "two hundred twenty-eight million, five hundred six thousand, eight hundred forty".