1987648 has 28 divisors (see below), whose sum is σ = 4249420. Its totient is φ = 916992.

The previous prime is 1987621. The next prime is 1987649. The reversal of 1987648 is 8467891.

It can be written as a sum of positive squares in 2 ways, for example, as 369664 + 1617984 = 608^2 + 1272^2 .

It is not an unprimeable number, because it can be changed into a prime (1987649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 363 + ... + 2026.

It is an arithmetic number, because the mean of its divisors is an integer number (151765).

2^1987648 is an apocalyptic number.

It is an amenable number.

1987648 is an abundant number, since it is smaller than the sum of its proper divisors (2261772).

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

1987648 is a wasteful number, since it uses less digits than its factorization.

1987648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2414 (or 2404 counting only the distinct ones).

The product of its digits is 96768, while the sum is 43.

The square root of 1987648 is about 1409.8397072008. The cubic root of 1987648 is about 125.7321934348.

The spelling of 1987648 in words is "one million, nine hundred eighty-seven thousand, six hundred forty-eight".