28640113210 has 8 divisors (see below), whose sum is σ = 51552203796. Its totient is φ = 11456045280.

The previous prime is 28640113193. The next prime is 28640113211. The reversal of 28640113210 is 1231104682.

It can be written as a sum of positive squares in 2 ways, for example, as 27643385169 + 996728041 = 166263^2 + 31571^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (28640113211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1432005651 + ... + 1432005670.

Almost surely, 2^28640113210 is an apocalyptic number.

28640113210 is a deficient number, since it is larger than the sum of its proper divisors (22912090586).

28640113210 is a wasteful number, since it uses less digits than its factorization.

28640113210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2864011328.

The product of its (nonzero) digits is 2304, while the sum is 28.

Adding to 28640113210 its reverse (1231104682), we get a palindrome (29871217892).

The spelling of 28640113210 in words is "twenty-eight billion, six hundred forty million, one hundred thirteen thousand, two hundred ten".