220878128 has 10 divisors (see below), whose sum is σ = 427951404. Its totient is φ = 110439056.

The previous prime is 220878061. The next prime is 220878137. The reversal of 220878128 is 821878022.

It is a junction number, because it is equal to n+sod(n) for n = 220878091 and 220878100.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6902426 + ... + 6902457.

Almost surely, 2^220878128 is an apocalyptic number.

It is an amenable number.

220878128 is a deficient number, since it is larger than the sum of its proper divisors (207073276).

220878128 is a wasteful number, since it uses less digits than its factorization.

220878128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13804891 (or 13804885 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 38.

The square root of 220878128 is about 14861.9691831197. The cubic root of 220878128 is about 604.4832032328.

The spelling of 220878128 in words is "two hundred twenty million, eight hundred seventy-eight thousand, one hundred twenty-eight".