228136705 has 16 divisors (see below), whose sum is σ = 291654720. Its totient is φ = 170814528.

The previous prime is 228136697. The next prime is 228136739. The reversal of 228136705 is 507631822.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 228136705 - 2³ = 228136697 is a prime.

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, 6582 + ... + 22351.

It is an arithmetic number, because the mean of its divisors is an integer number (18228420).

Almost surely, 2^228136705 is an apocalyptic number.

It is an amenable number.

228136705 is a deficient number, since it is larger than the sum of its proper divisors (63518015).

228136705 is a wasteful number, since it uses less digits than its factorization.

228136705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29040.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 228136705 is about 15104.1949471000. The cubic root of 228136705 is about 611.0335474806.

The spelling of 228136705 in words is "two hundred twenty-eight million, one hundred thirty-six thousand, seven hundred five".