1987887328 has 24 divisors (see below), whose sum is σ = 4472746992. Its totient is φ = 851951616.

The previous prime is 1987887311. The next prime is 1987887329. The reversal of 1987887328 is 8237887891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1987887329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4437025 + ... + 4437472.

It is an arithmetic number, because the mean of its divisors is an integer number (186364458).

Almost surely, 2^1987887328 is an apocalyptic number.

It is an amenable number.

1987887328 is an abundant number, since it is smaller than the sum of its proper divisors (2484859664).

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

1987887328 is an equidigital number, since it uses as much as digits as its factorization.

1987887328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8874514 (or 8874506 counting only the distinct ones).

The product of its digits is 10838016, while the sum is 61.

The square root of 1987887328 is about 44585.7300938316. The cubic root of 1987887328 is about 1257.3723960440.

It can be divided in two parts, 198788 and 7328, that added together give a square (206116 = 454²).

The spelling of 1987887328 in words is "one billion, nine hundred eighty-seven million, eight hundred eighty-seven thousand, three hundred twenty-eight".