228490000 has 100 divisors (see below), whose sum is σ = 562566796. Its totient is φ = 89856000.

The previous prime is 228489997. The next prime is 228490019. The reversal of 228490000 is 94822.

It can be written as a sum of positive squares in 10 ways, for example, as 220938496 + 7551504 = 14864^2 + 2748^2 .

It is a tau number, because it is divible by the number of its divisors (100).

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 729844 + ... + 730156.

Almost surely, 2^228490000 is an apocalyptic number.

228490000 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 228490000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (281283398).

228490000 is an abundant number, since it is smaller than the sum of its proper divisors (334076796).

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

228490000 is an equidigital number, since it uses as much as digits as its factorization.

228490000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414 (or 393 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 228490000 is about 15115.8856836111. The cubic root of 228490000 is about 611.3488025487.

The spelling of 228490000 in words is "two hundred twenty-eight million, four hundred ninety thousand".