228130438 has 4 divisors (see below), whose sum is σ = 342195660. Its totient is φ = 114065218.

The previous prime is 228130421. The next prime is 228130447. The reversal of 228130438 is 834031822.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57032608 + ... + 57032611.

It is an arithmetic number, because the mean of its divisors is an integer number (85548915).

Almost surely, 2^228130438 is an apocalyptic number.

228130438 is a deficient number, since it is larger than the sum of its proper divisors (114065222).

228130438 is a wasteful number, since it uses less digits than its factorization.

228130438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114065221.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 228130438 is about 15103.9874867533. The cubic root of 228130438 is about 611.0279523232.

The spelling of 228130438 in words is "two hundred twenty-eight million, one hundred thirty thousand, four hundred thirty-eight".