1987996 has 6 divisors (see below), whose sum is σ = 3479000. Its totient is φ = 993996.

The previous prime is 1987991. The next prime is 1988011. The reversal of 1987996 is 6997891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1987991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 248496 + ... + 248503.

2^1987996 is an apocalyptic number.

It is an amenable number.

1987996 is a deficient number, since it is larger than the sum of its proper divisors (1491004).

1987996 is a wasteful number, since it uses less digits than its factorization.

1987996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497003 (or 497001 counting only the distinct ones).

The product of its digits is 244944, while the sum is 49.

The square root of 1987996 is about 1409.9631200851. The cubic root of 1987996 is about 125.7395307920.

The spelling of 1987996 in words is "one million, nine hundred eighty-seven thousand, nine hundred ninety-six".