228781442 has 8 divisors (see below), whose sum is σ = 347028300. Its totient is φ = 113105344.

The previous prime is 228781439. The next prime is 228781453. The reversal of 228781442 is 244187822.

228781442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 220492801 + 8288641 = 14849^2 + 2879^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 228781396 and 228781405.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 642467 + ... + 642822.

Almost surely, 2^228781442 is an apocalyptic number.

228781442 is a deficient number, since it is larger than the sum of its proper divisors (118246858).

228781442 is a wasteful number, since it uses less digits than its factorization.

228781442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1285380.

The product of its digits is 57344, while the sum is 38.

The square root of 228781442 is about 15125.5228669954. The cubic root of 228781442 is about 611.6086199258.

The spelling of 228781442 in words is "two hundred twenty-eight million, seven hundred eighty-one thousand, four hundred forty-two".