26987309804 has 48 divisors (see below), whose sum is σ = 61545734208. Its totient is φ = 10048278528.

The previous prime is 26987309773. The next prime is 26987309819. The reversal of 26987309804 is 40890378962.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 26987309804.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2174429 + ... + 2186804.

It is an arithmetic number, because the mean of its divisors is an integer number (1282202796).

Almost surely, 2^26987309804 is an apocalyptic number.

It is an amenable number.

26987309804 is an abundant number, since it is smaller than the sum of its proper divisors (34558424404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26987309804 is a wasteful number, since it uses less digits than its factorization.

26987309804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4361274 (or 4361272 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 56.

The spelling of 26987309804 in words is "twenty-six billion, nine hundred eighty-seven million, three hundred nine thousand, eight hundred four".