28788116247 has 24 divisors (see below), whose sum is σ = 47750626560. Its totient is φ = 16529060880.

The previous prime is 28788116243. The next prime is 28788116249. The reversal of 28788116247 is 74261188782.

28788116247 is a `hidden beast` number, since 2 + 8 + 7 + 8 + 8 + 1 + 1 + 624 + 7 = 666.

It is not a de Polignac number, because 28788116247 - 2² = 28788116243 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28788116193 and 28788116202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28788116243) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7650463 + ... + 7654224.

It is an arithmetic number, because the mean of its divisors is an integer number (1989609440).

Almost surely, 2^28788116247 is an apocalyptic number.

28788116247 is a deficient number, since it is larger than the sum of its proper divisors (18962510313).

28788116247 is a wasteful number, since it uses less digits than its factorization.

28788116247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15304723 (or 15304720 counting only the distinct ones).

The product of its digits is 2408448, while the sum is 54.

The spelling of 28788116247 in words is "twenty-eight billion, seven hundred eighty-eight million, one hundred sixteen thousand, two hundred forty-seven".