228388344 has 48 divisors (see below), whose sum is σ = 596908200. Its totient is φ = 72815424.

The previous prime is 228388339. The next prime is 228388357. The reversal of 228388344 is 443883822.

It is a super-2 number, since 2×228388344² = 104322471350124672, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 228388296 and 228388305.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3702 + ... + 21690.

Almost surely, 2^228388344 is an apocalyptic number.

228388344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 228388344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (298454100).

228388344 is an abundant number, since it is smaller than the sum of its proper divisors (368519856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

228388344 is a wasteful number, since it uses less digits than its factorization.

228388344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18044 (or 18017 counting only the distinct ones).

The product of its digits is 294912, while the sum is 42.

The square root of 228388344 is about 15112.5227543253. The cubic root of 228388344 is about 611.2581253598.

The spelling of 228388344 in words is "two hundred twenty-eight million, three hundred eighty-eight thousand, three hundred forty-four".