28696972064 has 12 divisors (see below), whose sum is σ = 56497163814. Its totient is φ = 14348486016.

The previous prime is 28696972061. The next prime is 28696972091. The reversal of 28696972064 is 46027969682.

It can be written as a sum of positive squares in only one way, i.e., 23085763600 + 5611208464 = 151940^2 + 74908^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28696971994 and 28696972012.

It is not an unprimeable number, because it can be changed into a prime (28696972061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 448390157 + ... + 448390220.

Almost surely, 2^28696972064 is an apocalyptic number.

It is an amenable number.

28696972064 is a deficient number, since it is larger than the sum of its proper divisors (27800191750).

28696972064 is an equidigital number, since it uses as much as digits as its factorization.

28696972064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896780387 (or 896780379 counting only the distinct ones).

The product of its (nonzero) digits is 15676416, while the sum is 59.

The spelling of 28696972064 in words is "twenty-eight billion, six hundred ninety-six million, nine hundred seventy-two thousand, sixty-four".