228142705 has 32 divisors (see below), whose sum is σ = 319610880. Its totient is φ = 153109440.

The previous prime is 228142699. The next prime is 228142711. The reversal of 228142705 is 507241822.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (228142699) and next prime (228142711).

It is not a de Polignac number, because 228142705 - 2³ = 228142697 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, 635316 + ... + 635674.

It is an arithmetic number, because the mean of its divisors is an integer number (9987840).

Almost surely, 2^228142705 is an apocalyptic number.

It is an amenable number.

228142705 is a deficient number, since it is larger than the sum of its proper divisors (91468175).

228142705 is a wasteful number, since it uses less digits than its factorization.

228142705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709.

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 228142705 is about 15104.3935661118. The cubic root of 228142705 is about 611.0389041653.

The spelling of 228142705 in words is "two hundred twenty-eight million, one hundred forty-two thousand, seven hundred five".