1987554712 has 96 divisors (see below), whose sum is σ = 4487792400. Its totient is φ = 819498240.

The previous prime is 1987554689. The next prime is 1987554713. The reversal of 1987554712 is 2174557891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1987554713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 741118 + ... + 743794.

Almost surely, 2^1987554712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1987554712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2243896200).

1987554712 is an abundant number, since it is smaller than the sum of its proper divisors (2500237688).

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

1987554712 is a wasteful number, since it uses less digits than its factorization.

1987554712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2777 (or 2762 counting only the distinct ones).

The product of its digits is 705600, while the sum is 49.

The square root of 1987554712 is about 44581.9998654165. Note that the first 3 decimals coincide. The cubic root of 1987554712 is about 1257.3022637149.

It can be divided in two parts, 198 and 7554712, that multiplied together give a square (1495832976 = 38676²).

The spelling of 1987554712 in words is "one billion, nine hundred eighty-seven million, five hundred fifty-four thousand, seven hundred twelve".