1987489343700 has 432 divisors, whose sum is σ = 7752785040000. Its totient is φ = 415532436480.

The previous prime is 1987489343689. The next prime is 1987489343701. The reversal of 1987489343700 is 73439847891.

1987489343700 is a `hidden beast` number, since 1 + 9 + 87 + 489 + 3 + 4 + 3 + 70 + 0 = 666.

It is a super-2 number, since 2×1987489343700² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1987489343701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 3185026 + ... + 3757574.

Almost surely, 2^{1987489343700} is an apocalyptic number.

1987489343700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1987489343700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3876392520000).

1987489343700 is an abundant number, since it is smaller than the sum of its proper divisors (5765295696300).

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

1987489343700 is a wasteful number, since it uses less digits than its factorization.

1987489343700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572624 (or 572614 counting only the distinct ones).

The product of its (nonzero) digits is 36578304, while the sum is 63.

The spelling of 1987489343700 in words is "one trillion, nine hundred eighty-seven billion, four hundred eighty-nine million, three hundred forty-three thousand, seven hundred".