228387730 has 8 divisors (see below), whose sum is σ = 411097932. Its totient is φ = 91355088.

The previous prime is 228387701. The next prime is 228387737. The reversal of 228387730 is 37783822.

It can be written as a sum of positive squares in 2 ways, for example, as 209351961 + 19035769 = 14469^2 + 4363^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (228387737) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11419377 + ... + 11419396.

Almost surely, 2^228387730 is an apocalyptic number.

228387730 is a deficient number, since it is larger than the sum of its proper divisors (182710202).

228387730 is a wasteful number, since it uses less digits than its factorization.

228387730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22838780.

The product of its (nonzero) digits is 112896, while the sum is 40.

The square root of 228387730 is about 15112.5024400329. The cubic root of 228387730 is about 611.2575775899.

The spelling of 228387730 in words is "two hundred twenty-eight million, three hundred eighty-seven thousand, seven hundred thirty".