228594820 has 24 divisors (see below), whose sum is σ = 496603800. Its totient is φ = 88284672.

The previous prime is 228594811. The next prime is 228594829. The reversal of 228594820 is 28495822.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (228594811) and next prime (228594829).

It can be written as a sum of positive squares in 4 ways, for example, as 21752896 + 206841924 = 4664^2 + 14382^2 .

It is not an unprimeable number, because it can be changed into a prime (228594829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196485 + ... + 197644.

It is an arithmetic number, because the mean of its divisors is an integer number (20691825).

Almost surely, 2^228594820 is an apocalyptic number.

228594820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228594820 is an abundant number, since it is smaller than the sum of its proper divisors (268008980).

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

228594820 is a wasteful number, since it uses less digits than its factorization.

228594820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394167 (or 394165 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 40.

The square root of 228594820 is about 15119.3524993632. The cubic root of 228594820 is about 611.4422738674.

The spelling of 228594820 in words is "two hundred twenty-eight million, five hundred ninety-four thousand, eight hundred twenty".