228438881 has 16 divisors (see below), whose sum is σ = 265291200. Its totient is φ = 194515200.

The previous prime is 228438863. The next prime is 228438883. The reversal of 228438881 is 188834822.

It is not a de Polignac number, because 228438881 - 2⁶ = 228438817 is a prime.

It is a super-2 number, since 2×228438881² = 104368644705064322, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (228438883) 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, 12461 + ... + 24741.

It is an arithmetic number, because the mean of its divisors is an integer number (16580700).

Almost surely, 2^228438881 is an apocalyptic number.

It is an amenable number.

228438881 is a deficient number, since it is larger than the sum of its proper divisors (36852319).

228438881 is a wasteful number, since it uses less digits than its factorization.

228438881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12400.

The product of its digits is 196608, while the sum is 44.

The square root of 228438881 is about 15114.1946857912. The cubic root of 228438881 is about 611.3032077447.

The spelling of 228438881 in words is "two hundred twenty-eight million, four hundred thirty-eight thousand, eight hundred eighty-one".