28061404287 has 16 divisors (see below), whose sum is σ = 43016289792. Its totient is φ = 15939067680.

The previous prime is 28061404237. The next prime is 28061404303. The reversal of 28061404287 is 78240416082.

It is not a de Polignac number, because 28061404287 - 2⁸ = 28061404031 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28061404237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3997264 + ... + 4004277.

It is an arithmetic number, because the mean of its divisors is an integer number (2688518112).

Almost surely, 2^28061404287 is an apocalyptic number.

28061404287 is a deficient number, since it is larger than the sum of its proper divisors (14954885505).

28061404287 is a wasteful number, since it uses less digits than its factorization.

28061404287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8001718.

The product of its (nonzero) digits is 172032, while the sum is 42.

The spelling of 28061404287 in words is "twenty-eight billion, sixty-one million, four hundred four thousand, two hundred eighty-seven".