228507073 has 8 divisors (see below), whose sum is σ = 229680360. Its totient is φ = 227337600.

The previous prime is 228507067. The next prime is 228507109. The reversal of 228507073 is 370705822.

It can be written as a sum of positive squares in 4 ways, for example, as 124813584 + 103693489 = 11172^2 + 10183^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228507073 is a prime.

It is a super-2 number, since 2×228507073² = 104430964822054658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228507023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 286311 + ... + 287107.

It is an arithmetic number, because the mean of its divisors is an integer number (28710045).

Almost surely, 2^228507073 is an apocalyptic number.

It is an amenable number.

228507073 is a deficient number, since it is larger than the sum of its proper divisors (1173287).

228507073 is an equidigital number, since it uses as much as digits as its factorization.

228507073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1907.

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 228507073 is about 15116.4504100665. The cubic root of 228507073 is about 611.3640290330.

The spelling of 228507073 in words is "two hundred twenty-eight million, five hundred seven thousand, seventy-three".