1987732224 has 126 divisors (see below), whose sum is σ = 5949386996. Its totient is φ = 662515200.

The previous prime is 1987732211. The next prime is 1987732231. The reversal of 1987732224 is 4222377891.

It is a self number, because there is not a number n which added to its sum of digits gives 1987732224.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 181299 + ... + 191949.

Almost surely, 2^1987732224 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 1987732224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2974693498).

1987732224 is an abundant number, since it is smaller than the sum of its proper divisors (3961654772).

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

1987732224 is an frugal number, since it uses more digits than its factorization.

1987732224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10685 (or 10656 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 1987732224 is about 44583.9906692974. The cubic root of 1987732224 is about 1257.3396932246.

The spelling of 1987732224 in words is "one billion, nine hundred eighty-seven million, seven hundred thirty-two thousand, two hundred twenty-four".