228641805 has 64 divisors (see below), whose sum is σ = 466629120. Its totient is φ = 104053248.

The previous prime is 228641741. The next prime is 228641807. The reversal of 228641805 is 508146822.

228641805 is a `hidden beast` number, since 2 + 2 + 8 + 641 + 8 + 0 + 5 = 666.

It is not a de Polignac number, because 228641805 - 2⁶ = 228641741 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 228641805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228641807) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 295399 + ... + 296171.

It is an arithmetic number, because the mean of its divisors is an integer number (7291080).

Almost surely, 2^228641805 is an apocalyptic number.

It is an amenable number.

228641805 is an abundant number, since it is smaller than the sum of its proper divisors (237987315).

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

228641805 is a wasteful number, since it uses less digits than its factorization.

228641805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1107 (or 1101 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 228641805 is about 15120.9062228426. The cubic root of 228641805 is about 611.4841626078.

The spelling of 228641805 in words is "two hundred twenty-eight million, six hundred forty-one thousand, eight hundred five".