28321078226 has 16 divisors (see below), whose sum is σ = 51406327296. Its totient is φ = 11423628096.

The previous prime is 28321078199. The next prime is 28321078237. The reversal of 28321078226 is 62287012382.

It is a happy number.

It is a super-2 number, since 2×28321078226² (a number of 22 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, 59497826 + ... + 59498301.

It is an arithmetic number, because the mean of its divisors is an integer number (3212895456).

Almost surely, 2^28321078226 is an apocalyptic number.

28321078226 is a deficient number, since it is larger than the sum of its proper divisors (23085249070).

28321078226 is a wasteful number, since it uses less digits than its factorization.

28321078226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118996153.

The product of its (nonzero) digits is 129024, while the sum is 41.

The spelling of 28321078226 in words is "twenty-eight billion, three hundred twenty-one million, seventy-eight thousand, two hundred twenty-six".