28078088787 has 48 divisors (see below), whose sum is σ = 49491307008. Its totient is φ = 14990088960.

The previous prime is 28078088783. The next prime is 28078088789. The reversal of 28078088787 is 78788087082.

It is not a de Polignac number, because 28078088787 - 2² = 28078088783 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (28078088783) 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, 163014 + ... + 287627.

It is an arithmetic number, because the mean of its divisors is an integer number (1031068896).

Almost surely, 2^28078088787 is an apocalyptic number.

28078088787 is a deficient number, since it is larger than the sum of its proper divisors (21413218221).

28078088787 is a wasteful number, since it uses less digits than its factorization.

28078088787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450720 (or 450717 counting only the distinct ones).

The product of its (nonzero) digits is 22478848, while the sum is 63.

The spelling of 28078088787 in words is "twenty-eight billion, seventy-eight million, eighty-eight thousand, seven hundred eighty-seven".