1987956 has 48 divisors (see below), whose sum is σ = 5241600. Its totient is φ = 651456.

The previous prime is 1987939. The next prime is 1987969. The reversal of 1987956 is 6597891.

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, 8416 + ... + 8648.

It is an arithmetic number, because the mean of its divisors is an integer number (109200).

2^1987956 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 1987956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2620800).

1987956 is an abundant number, since it is smaller than the sum of its proper divisors (3253644).

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

1987956 is a wasteful number, since it uses less digits than its factorization.

1987956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325 (or 317 counting only the distinct ones).

The product of its digits is 136080, while the sum is 45.

The square root of 1987956 is about 1409.9489352455. The cubic root of 1987956 is about 125.7386874612.

The spelling of 1987956 in words is "one million, nine hundred eighty-seven thousand, nine hundred fifty-six".