1987733055 has 128 divisors (see below), whose sum is σ = 4110391296. Its totient is φ = 796262400.

The previous prime is 1987733017. The next prime is 1987733063. The reversal of 1987733055 is 5503377891.

It is a Cunningham number, because it is equal to 44584²-1.

It is not a de Polignac number, because 1987733055 - 2¹¹ = 1987731007 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1987732995 and 1987733013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 8247735 + ... + 8247975.

It is an arithmetic number, because the mean of its divisors is an integer number (32112432).

Almost surely, 2^1987733055 is an apocalyptic number.

1987733055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1987733055 is an abundant number, since it is smaller than the sum of its proper divisors (2122658241).

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

1987733055 is a wasteful number, since it uses less digits than its factorization.

1987733055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497.

The product of its (nonzero) digits is 793800, while the sum is 48.

The square root of 1987733055 is about 44583.9999887852. Note that the first 4 decimals coincide. The cubic root of 1987733055 is about 1257.3398684409.

The spelling of 1987733055 in words is "one billion, nine hundred eighty-seven million, seven hundred thirty-three thousand, fifty-five".