28678745104 has 15 divisors (see below), whose sum is σ = 55566381117. Its totient is φ = 14339033856.

The previous prime is 28678745101. The next prime is 28678745107. The reversal of 28678745104 is 40154787682.

The square root of 28678745104 is 169348.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (28678745101) and next prime (28678745107).

It can be written as a sum of positive squares in only one way, i.e., 23672899600 + 5005845504 = 153860^2 + 70752^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28678745101) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 656224 + ... + 698560.

Almost surely, 2^28678745104 is an apocalyptic number.

28678745104 is the 169348-th square number.

It is an amenable number.

28678745104 is a deficient number, since it is larger than the sum of its proper divisors (26887636013).

28678745104 is an frugal number, since it uses more digits than its factorization.

28678745104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84682 (or 42339 counting only the distinct ones).

The product of its (nonzero) digits is 3010560, while the sum is 52.

The spelling of 28678745104 in words is "twenty-eight billion, six hundred seventy-eight million, seven hundred forty-five thousand, one hundred four".