228643730 has 16 divisors (see below), whose sum is σ = 470352960. Its totient is φ = 78392112.

The previous prime is 228643729. The next prime is 228643733. The reversal of 228643730 is 37346822.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (228643733) by changing a digit.

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, 1633100 + ... + 1633239.

It is an arithmetic number, because the mean of its divisors is an integer number (29397060).

Almost surely, 2^228643730 is an apocalyptic number.

228643730 is an abundant number, since it is smaller than the sum of its proper divisors (241709230).

228643730 is a wasteful number, since it uses less digits than its factorization.

228643730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3266353.

The product of its (nonzero) digits is 48384, while the sum is 35.

The square root of 228643730 is about 15120.9698763009. The cubic root of 228643730 is about 611.4858786890.

The spelling of 228643730 in words is "two hundred twenty-eight million, six hundred forty-three thousand, seven hundred thirty".