228628420 has 24 divisors (see below), whose sum is σ = 491287104. Its totient is φ = 89324256.

The previous prime is 228628409. The next prime is 228628453. The reversal of 228628420 is 24826822.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132064 + ... + 133783.

It is an arithmetic number, because the mean of its divisors is an integer number (20470296).

Almost surely, 2^228628420 is an apocalyptic number.

228628420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228628420 is an abundant number, since it is smaller than the sum of its proper divisors (262658684).

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

228628420 is a wasteful number, since it uses less digits than its factorization.

228628420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265899 (or 265897 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 34.

The square root of 228628420 is about 15120.4636172308. The cubic root of 228628420 is about 611.4722300054.

The spelling of 228628420 in words is "two hundred twenty-eight million, six hundred twenty-eight thousand, four hundred twenty".