228420485 has 8 divisors (see below), whose sum is σ = 274187256. Its totient is φ = 182681280.

The previous prime is 228420457. The next prime is 228420581. The reversal of 228420485 is 584024822.

It can be written as a sum of positive squares in 4 ways, for example, as 132204004 + 96216481 = 11498^2 + 9809^2 .

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

It is not a de Polignac number, because 228420485 - 2⁶ = 228420421 is a prime.

It is a Duffinian number.

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, 23675 + ... + 31895.

It is an arithmetic number, because the mean of its divisors is an integer number (34273407).

Almost surely, 2^228420485 is an apocalyptic number.

It is an amenable number.

228420485 is a deficient number, since it is larger than the sum of its proper divisors (45766771).

228420485 is an equidigital number, since it uses as much as digits as its factorization.

228420485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13783.

The product of its (nonzero) digits is 40960, while the sum is 35.

The square root of 228420485 is about 15113.5861065467. The cubic root of 228420485 is about 611.2867980518.

The spelling of 228420485 in words is "two hundred twenty-eight million, four hundred twenty thousand, four hundred eighty-five".