1687340 has 24 divisors (see below), whose sum is σ = 3568320. Its totient is φ = 670208.

The previous prime is 1687339. The next prime is 1687373. The reversal of 1687340 is 437861.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4604 + ... + 4956.

It is an arithmetic number, because the mean of its divisors is an integer number (148680).

2^1687340 is an apocalyptic number.

1687340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1687340 is an abundant number, since it is smaller than the sum of its proper divisors (1880980).

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

1687340 is a wasteful number, since it uses less digits than its factorization.

1687340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601 (or 599 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 1687340 is about 1298.9765201881. The cubic root of 1687340 is about 119.0513160503.

The spelling of 1687340 in words is "one million, six hundred eighty-seven thousand, three hundred forty".