228418421 has 16 divisors (see below), whose sum is σ = 291731328. Its totient is φ = 173644800.

The previous prime is 228418403. The next prime is 228418433. The reversal of 228418421 is 124814822.

It is not a de Polignac number, because 228418421 - 2¹⁸ = 228156277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228418121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33020 + ... + 39333.

It is an arithmetic number, because the mean of its divisors is an integer number (18233208).

Almost surely, 2^228418421 is an apocalyptic number.

It is an amenable number.

228418421 is a deficient number, since it is larger than the sum of its proper divisors (63312907).

228418421 is a wasteful number, since it uses less digits than its factorization.

228418421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72412.

The product of its digits is 8192, while the sum is 32.

The square root of 228418421 is about 15113.5178234586. The cubic root of 228418421 is about 611.2849568571.

The spelling of 228418421 in words is "two hundred twenty-eight million, four hundred eighteen thousand, four hundred twenty-one".