1228888861587 has 36 divisors (see below), whose sum is σ = 1850890320136. Its totient is φ = 815858775360.

The previous prime is 1228888861579. The next prime is 1228888861619. The reversal of 1228888861587 is 7851688888221.

1228888861587 is a `hidden beast` number, since 12 + 28 + 8 + 8 + 8 + 8 + 6 + 1 + 587 = 666.

It is not a de Polignac number, because 1228888861587 - 2³ = 1228888861579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1228888861567) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1192608 + ... + 1969794.

Almost surely, 2^{1228888861587} is an apocalyptic number.

1228888861587 is a deficient number, since it is larger than the sum of its proper divisors (622001458549).

1228888861587 is an frugal number, since it uses more digits than its factorization.

1228888861587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777452 (or 777431 counting only the distinct ones).

The product of its digits is 220200960, while the sum is 72.

The spelling of 1228888861587 in words is "one trillion, two hundred twenty-eight billion, eight hundred eighty-eight million, eight hundred sixty-one thousand, five hundred eighty-seven".