228138367 has 4 divisors (see below), whose sum is σ = 228523680. Its totient is φ = 227753056.

The previous prime is 228138343. The next prime is 228138401. The reversal of 228138367 is 763831822.

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

It is a cyclic number.

It is not a de Polignac number, because 228138367 - 2¹⁵ = 228105599 is a prime.

It is a super-2 number, since 2×228138367² = 104094228994853378, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228138307) 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, 191767 + ... + 192952.

It is an arithmetic number, because the mean of its divisors is an integer number (57130920).

Almost surely, 2^228138367 is an apocalyptic number.

228138367 is a deficient number, since it is larger than the sum of its proper divisors (385313).

228138367 is an equidigital number, since it uses as much as digits as its factorization.

228138367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385312.

The product of its digits is 96768, while the sum is 40.

The square root of 228138367 is about 15104.2499648278. The cubic root of 228138367 is about 611.0350312917.

The spelling of 228138367 in words is "two hundred twenty-eight million, one hundred thirty-eight thousand, three hundred sixty-seven".