1987224330 has 128 divisors (see below), whose sum is σ = 5925685248. Its totient is φ = 415302912.

The previous prime is 1987224329. The next prime is 1987224331. The reversal of 1987224330 is 334227891.

It is an interprime number because it is at equal distance from previous prime (1987224329) and next prime (1987224331).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1987224331) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 288709 + ... + 295511.

It is an arithmetic number, because the mean of its divisors is an integer number (46294416).

Almost surely, 2^1987224330 is an apocalyptic number.

1987224330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1987224330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2962842624).

1987224330 is an abundant number, since it is smaller than the sum of its proper divisors (3938460918).

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

1987224330 is a wasteful number, since it uses less digits than its factorization.

1987224330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6940.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 1987224330 is about 44578.2943819074. The cubic root of 1987224330 is about 1257.2325946801.

The spelling of 1987224330 in words is "one billion, nine hundred eighty-seven million, two hundred twenty-four thousand, three hundred thirty".