220028220028 has 48 divisors (see below), whose sum is σ = 395186285088. Its totient is φ = 107157600000.

The previous prime is 220028220017. The next prime is 220028220031. The reversal of 220028220028 is 820022820022.

220028220028 is a nontrivial binomial coefficient, being equal to C(663368, 2).

It is a junction number, because it is equal to n+sod(n) for n = 220028219978 and 220028220005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22217878 + ... + 22227778.

It is an arithmetic number, because the mean of its divisors is an integer number (8233047606).

Almost surely, 2^220028220028 is an apocalyptic number.

220028220028 is the 663367-th triangular number and also the 331684-th hexagonal number.

220028220028 is the 221123-rd centered nonagonal number.

It is an amenable number.

220028220028 is a deficient number, since it is larger than the sum of its proper divisors (175158065060).

220028220028 is a wasteful number, since it uses less digits than its factorization.

220028220028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10894 (or 10892 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 28.

The spelling of 220028220028 in words is "two hundred twenty billion, twenty-eight million, two hundred twenty thousand, twenty-eight".