220628328442385 has 8 divisors (see below), whose sum is σ = 273883442204520. Its totient is φ = 170416364038144.

The previous prime is 220628328442339. The next prime is 220628328442391. The reversal of 220628328442385 is 583244823826022.

It can be written as a sum of positive squares in 4 ways, for example, as 154058605009 + 220474269837376 = 392503^2 + 14848376^2 .

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 220628328442385 - 2⁶ = 220628328442321 is a prime.

It is a super-2 number, since 2×220628328442385² (a number of 29 digits) contains 22 as substring.

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, 760787339312 + ... + 760787339601.

It is an arithmetic number, because the mean of its divisors is an integer number (34235430275565).

Almost surely, 2^{220628328442385} is an apocalyptic number.

It is an amenable number.

220628328442385 is a deficient number, since it is larger than the sum of its proper divisors (53255113762135).

220628328442385 is a wasteful number, since it uses less digits than its factorization.

220628328442385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1521574678947.

The product of its (nonzero) digits is 70778880, while the sum is 59.

The spelling of 220628328442385 in words is "two hundred twenty trillion, six hundred twenty-eight billion, three hundred twenty-eight million, four hundred forty-two thousand, three hundred eighty-five".