1987392 has 56 divisors (see below), whose sum is σ = 5742432. Its totient is φ = 601600.

The previous prime is 1987373. The next prime is 1987411. The reversal of 1987392 is 2937891.

It is an interprime number because it is at equal distance from previous prime (1987373) and next prime (1987411).

It is a self number, because there is not a number n which added to its sum of digits gives 1987392.

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, 1642 + ... + 2582.

2^1987392 is an apocalyptic number.

1987392 is a gapful number since it is divisible by the number (12) 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 1987392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2871216).

1987392 is an abundant number, since it is smaller than the sum of its proper divisors (3755040).

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

1987392 is a wasteful number, since it uses less digits than its factorization.

1987392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 967 (or 957 counting only the distinct ones).

The product of its digits is 27216, while the sum is 39.

The square root of 1987392 is about 1409.7489138141. The cubic root of 1987392 is about 125.7267952920.

The spelling of 1987392 in words is "one million, nine hundred eighty-seven thousand, three hundred ninety-two".