28788624991 has 48 divisors (see below), whose sum is σ = 35793774720. Its totient is φ = 23020200000.

The previous prime is 28788624983. The next prime is 28788625031. The reversal of 28788624991 is 19942688782.

It is a happy number.

It is not a de Polignac number, because 28788624991 - 2³ = 28788624983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28788624901) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19839816 + ... + 19841266.

It is an arithmetic number, because the mean of its divisors is an integer number (745703640).

Almost surely, 2^28788624991 is an apocalyptic number.

28788624991 is a deficient number, since it is larger than the sum of its proper divisors (7005149729).

28788624991 is a wasteful number, since it uses less digits than its factorization.

28788624991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1796 (or 1789 counting only the distinct ones).

The product of its digits is 27869184, while the sum is 64.

The spelling of 28788624991 in words is "twenty-eight billion, seven hundred eighty-eight million, six hundred twenty-four thousand, nine hundred ninety-one".