228538405 has 16 divisors (see below), whose sum is σ = 277346304. Its totient is φ = 180774720.

The previous prime is 228538397. The next prime is 228538423. The reversal of 228538405 is 504835822.

It is not a de Polignac number, because 228538405 - 2³ = 228538397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 311419 + ... + 312151.

It is an arithmetic number, because the mean of its divisors is an integer number (17334144).

Almost surely, 2^228538405 is an apocalyptic number.

It is an amenable number.

228538405 is a deficient number, since it is larger than the sum of its proper divisors (48807899).

228538405 is a wasteful number, since it uses less digits than its factorization.

228538405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1356.

The product of its (nonzero) digits is 76800, while the sum is 37.

The square root of 228538405 is about 15117.4867289507. The cubic root of 228538405 is about 611.3919703742.

The spelling of 228538405 in words is "two hundred twenty-eight million, five hundred thirty-eight thousand, four hundred five".