1687488 has 112 divisors (see below), whose sum is σ = 5266944. Its totient is φ = 471040.

The previous prime is 1687453. The next prime is 1687489. The reversal of 1687488 is 8847861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1687489) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35881 + ... + 35927.

2^1687488 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 1687488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2633472).

1687488 is an abundant number, since it is smaller than the sum of its proper divisors (3579456).

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

1687488 is a wasteful number, since it uses less digits than its factorization.

1687488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90 (or 80 counting only the distinct ones).

The product of its digits is 86016, while the sum is 42.

The square root of 1687488 is about 1299.0334868663. The cubic root of 1687488 is about 119.0547966923.

The spelling of 1687488 in words is "one million, six hundred eighty-seven thousand, four hundred eighty-eight".