28220667069 has 96 divisors (see below), whose sum is σ = 47036436480. Its totient is φ = 14978476800.

The previous prime is 28220667043. The next prime is 28220667091. The reversal of 28220667069 is 96076602282.

It is not a de Polignac number, because 28220667069 - 2⁵ = 28220667037 is a prime.

It is a super-2 number, since 2×28220667069² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28220667019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 11559889 + ... + 11562329.

It is an arithmetic number, because the mean of its divisors is an integer number (489962880).

Almost surely, 2^28220667069 is an apocalyptic number.

It is an amenable number.

28220667069 is a deficient number, since it is larger than the sum of its proper divisors (18815769411).

28220667069 is a wasteful number, since it uses less digits than its factorization.

28220667069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2591 (or 2584 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 48.

The spelling of 28220667069 in words is "twenty-eight billion, two hundred twenty million, six hundred sixty-seven thousand, sixty-nine".