28285247787 has 8 divisors (see below), whose sum is σ = 37832635536. Its totient is φ = 18797345952.

The previous prime is 28285247773. The next prime is 28285247789. The reversal of 28285247787 is 78774258282.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28285247787 - 2⁶ = 28285247723 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28285247787.

It is not an unprimeable number, because it can be changed into a prime (28285247789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14870368 + ... + 14872269.

It is an arithmetic number, because the mean of its divisors is an integer number (4729079442).

Almost surely, 2^28285247787 is an apocalyptic number.

28285247787 is a deficient number, since it is larger than the sum of its proper divisors (9547387749).

28285247787 is a wasteful number, since it uses less digits than its factorization.

28285247787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29742957.

The product of its digits is 28098560, while the sum is 60.

The spelling of 28285247787 in words is "twenty-eight billion, two hundred eighty-five million, two hundred forty-seven thousand, seven hundred eighty-seven".