220990156928 has 72 divisors (see below), whose sum is σ = 452877442605. Its totient is φ = 107412991488.

The previous prime is 220990156927. The next prime is 220990156987. The reversal of 220990156928 is 829651099022.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 178293373504 + 42696783424 = 422248^2 + 206632^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=332408.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 220990156928.

It is not an unprimeable number, because it can be changed into a prime (220990156927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 196784975 + ... + 196786097.

Almost surely, 2^220990156928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 220990156928

220990156928 is an abundant number, since it is smaller than the sum of its proper divisors (231887285677).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

220990156928 is an frugal number, since it uses more digits than its factorization.

220990156928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2334 (or 1162 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 53.

The spelling of 220990156928 in words is "two hundred twenty billion, nine hundred ninety million, one hundred fifty-six thousand, nine hundred twenty-eight".