1987320 has 32 divisors (see below), whose sum is σ = 5962320. Its totient is φ = 529920.

The previous prime is 1987313. The next prime is 1987333. The reversal of 1987320 is 237891.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8161 + ... + 8400.

2^1987320 is an apocalyptic number.

1987320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1987320 is an abundant number, since it is smaller than the sum of its proper divisors (3975000).

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

1987320 is a wasteful number, since it uses less digits than its factorization.

1987320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16575 (or 16571 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 1987320 is about 1409.7233771205. The cubic root of 1987320 is about 125.7252769808.

The spelling of 1987320 in words is "one million, nine hundred eighty-seven thousand, three hundred twenty".