1987238120 has 384 divisors, whose sum is σ = 6013180800. Its totient is φ = 585252864.

The previous prime is 1987238119. The next prime is 1987238153. The reversal of 1987238120 is 218327891.

It is a super-2 number, since 2×1987238120² = 7898230691162268800, which contains 22 as substring.

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 95 ways as a sum of consecutive naturals, for example, 27222404 + ... + 27222476.

It is an arithmetic number, because the mean of its divisors is an integer number (15659325).

Almost surely, 2^1987238120 is an apocalyptic number.

1987238120 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 1987238120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3006590400).

1987238120 is an abundant number, since it is smaller than the sum of its proper divisors (4025942680).

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

1987238120 is a wasteful number, since it uses less digits than its factorization.

1987238120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177 (or 166 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 1987238120 is about 44578.4490533262. The cubic root of 1987238120 is about 1257.2355027896.

The spelling of 1987238120 in words is "one billion, nine hundred eighty-seven million, two hundred thirty-eight thousand, one hundred twenty".