228389730 has 32 divisors (see below), whose sum is σ = 580379904. Its totient is φ = 57321216.

The previous prime is 228389729. The next prime is 228389731. The reversal of 228389730 is 37983822.

It is an interprime number because it is at equal distance from previous prime (228389729) and next prime (228389731).

It is not an unprimeable number, because it can be changed into a prime (228389731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 223402 + ... + 224421.

It is an arithmetic number, because the mean of its divisors is an integer number (18136872).

Almost surely, 2^228389730 is an apocalyptic number.

228389730 is an abundant number, since it is smaller than the sum of its proper divisors (351990174).

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

228389730 is a wasteful number, since it uses less digits than its factorization.

228389730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447850.

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 228389730 is about 15112.5686102661. The cubic root of 228389730 is about 611.2593618533.

The spelling of 228389730 in words is "two hundred twenty-eight million, three hundred eighty-nine thousand, seven hundred thirty".