228993445 has 8 divisors (see below), whose sum is σ = 276798744. Its totient is φ = 181857024.

The previous prime is 228993397. The next prime is 228993461. The reversal of 228993445 is 544399822.

228993445 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 34363044 + 194630401 = 5862^2 + 13951^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 228993445 - 2²³ = 220604837 is a prime.

It is a super-3 number, since 3×228993445³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 228993395 and 228993404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166464 + ... + 167833.

It is an arithmetic number, because the mean of its divisors is an integer number (34599843).

Almost surely, 2^228993445 is an apocalyptic number.

It is an amenable number.

228993445 is a deficient number, since it is larger than the sum of its proper divisors (47805299).

228993445 is a wasteful number, since it uses less digits than its factorization.

228993445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334439.

The product of its digits is 622080, while the sum is 46.

The square root of 228993445 is about 15132.5293655753. The cubic root of 228993445 is about 611.7974796960.

The spelling of 228993445 in words is "two hundred twenty-eight million, nine hundred ninety-three thousand, four hundred forty-five".