1689470 has 16 divisors (see below), whose sum is σ = 3112560. Its totient is φ = 659904.

The previous prime is 1689451. The next prime is 1689497. The reversal of 1689470 is 749861.

It is a self number, because there is not a number n which added to its sum of digits gives 1689470.

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, 1535 + ... + 2394.

It is an arithmetic number, because the mean of its divisors is an integer number (194535).

2^1689470 is an apocalyptic number.

1689470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1689470 is a deficient number, since it is larger than the sum of its proper divisors (1423090).

1689470 is a wasteful number, since it uses less digits than its factorization.

1689470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3979.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 1689470 is about 1299.7961378616. The cubic root of 1689470 is about 119.1013894748.

The spelling of 1689470 in words is "one million, six hundred eighty-nine thousand, four hundred seventy".