1987275852 has 18 divisors (see below), whose sum is σ = 5023391828. Its totient is φ = 662425272.

The previous prime is 1987275841. The next prime is 1987275869. The reversal of 1987275852 is 2585727891.

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27601018 + ... + 27601089.

Almost surely, 2^1987275852 is an apocalyptic number.

1987275852 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1987275852 is an abundant number, since it is smaller than the sum of its proper divisors (3036115976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1987275852 is a wasteful number, since it uses less digits than its factorization.

1987275852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55202117 (or 55202112 counting only the distinct ones).

The product of its digits is 2822400, while the sum is 54.

The square root of 1987275852 is about 44578.8722602984. The cubic root of 1987275852 is about 1257.2434598480.

The spelling of 1987275852 in words is "one billion, nine hundred eighty-seven million, two hundred seventy-five thousand, eight hundred fifty-two".