28601320987 has 8 divisors (see below), whose sum is σ = 28673845200. Its totient is φ = 28528885920.

The previous prime is 28601320981. The next prime is 28601321003. The reversal of 28601320987 is 78902310682.

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

It is a cyclic number.

It is not a de Polignac number, because 28601320987 - 2⁷ = 28601320859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28601320981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 645264 + ... + 688162.

It is an arithmetic number, because the mean of its divisors is an integer number (3584230650).

Almost surely, 2^28601320987 is an apocalyptic number.

28601320987 is a deficient number, since it is larger than the sum of its proper divisors (72524213).

28601320987 is a wasteful number, since it uses less digits than its factorization.

28601320987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44573.

The product of its (nonzero) digits is 290304, while the sum is 46.

The spelling of 28601320987 in words is "twenty-eight billion, six hundred one million, three hundred twenty thousand, nine hundred eighty-seven".