987188265 has 24 divisors (see below), whose sum is σ = 1955573568. Its totient is φ = 451285920.

The previous prime is 987188243. The next prime is 987188291. The reversal of 987188265 is 562881789.

It is not a de Polignac number, because 987188265 - 2⁵ = 987188233 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1566651 + ... + 1567280.

It is an arithmetic number, because the mean of its divisors is an integer number (81482232).

Almost surely, 2^987188265 is an apocalyptic number.

It is an amenable number.

987188265 is a deficient number, since it is larger than the sum of its proper divisors (968385303).

987188265 is a wasteful number, since it uses less digits than its factorization.

987188265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3133949 (or 3133946 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 54.

The square root of 987188265 is about 31419.5522724306. The cubic root of 987188265 is about 995.7110528979.

The spelling of 987188265 in words is "nine hundred eighty-seven million, one hundred eighty-eight thousand, two hundred sixty-five".