28143626290 has 16 divisors (see below), whose sum is σ = 54555337368. Its totient is φ = 10391492736.

The previous prime is 28143626267. The next prime is 28143626297. The reversal of 28143626290 is 9262634182.

It can be written as a sum of positive squares in 4 ways, for example, as 11245966209 + 16897660081 = 106047^2 + 129991^2 .

It is not an unprimeable number, because it can be changed into a prime (28143626297) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108244587 + ... + 108244846.

Almost surely, 2^28143626290 is an apocalyptic number.

28143626290 is a deficient number, since it is larger than the sum of its proper divisors (26411711078).

28143626290 is a wasteful number, since it uses less digits than its factorization.

28143626290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216489453.

The product of its (nonzero) digits is 248832, while the sum is 43.

The spelling of 28143626290 in words is "twenty-eight billion, one hundred forty-three million, six hundred twenty-six thousand, two hundred ninety".