1987107320 has 64 divisors (see below), whose sum is σ = 4886632800. Its totient is φ = 721223680.

The previous prime is 1987107319. The next prime is 1987107337. The reversal of 1987107320 is 237017891.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 246392 + ... + 254328.

Almost surely, 2^1987107320 is an apocalyptic number.

1987107320 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 1987107320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2443316400).

1987107320 is an abundant number, since it is smaller than the sum of its proper divisors (2899525480).

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

1987107320 is a wasteful number, since it uses less digits than its factorization.

1987107320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8528 (or 8524 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 38.

The square root of 1987107320 is about 44576.9819525728. The cubic root of 1987107320 is about 1257.2079184402.

The spelling of 1987107320 in words is "one billion, nine hundred eighty-seven million, one hundred seven thousand, three hundred twenty".