228538705 has 32 divisors (see below), whose sum is σ = 292377600. Its totient is φ = 171225600.

The previous prime is 228538697. The next prime is 228538721. The reversal of 228538705 is 507835822.

228538705 = T₄₆ + T₄₇ + ... + T₁₁₁₀.

It is not a de Polignac number, because 228538705 - 2³ = 228538697 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 813165 + ... + 813445.

It is an arithmetic number, because the mean of its divisors is an integer number (9136800).

Almost surely, 2^228538705 is an apocalyptic number.

It is an amenable number.

228538705 is a deficient number, since it is larger than the sum of its proper divisors (63838895).

228538705 is a wasteful number, since it uses less digits than its factorization.

228538705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465.

The product of its (nonzero) digits is 134400, while the sum is 40.

The square root of 228538705 is about 15117.4966512316. The cubic root of 228538705 is about 611.3922378968.

The spelling of 228538705 in words is "two hundred twenty-eight million, five hundred thirty-eight thousand, seven hundred five".