228666507 has 8 divisors (see below), whose sum is σ = 322823376. Its totient is φ = 143476992.

The previous prime is 228666497. The next prime is 228666533. The reversal of 228666507 is 705666822.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 228666507 - 2²⁰ = 227617931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (228666107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2241778 + ... + 2241879.

It is an arithmetic number, because the mean of its divisors is an integer number (40352922).

Almost surely, 2^228666507 is an apocalyptic number.

228666507 is a deficient number, since it is larger than the sum of its proper divisors (94156869).

228666507 is a wasteful number, since it uses less digits than its factorization.

228666507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4483677.

The product of its (nonzero) digits is 241920, while the sum is 42.

The square root of 228666507 is about 15121.7230169052. The cubic root of 228666507 is about 611.5061829871.

The spelling of 228666507 in words is "two hundred twenty-eight million, six hundred sixty-six thousand, five hundred seven".