1690830 has 24 divisors (see below), whose sum is σ = 4396392. Its totient is φ = 450864.

The previous prime is 1690811. The next prime is 1690831. The reversal of 1690830 is 380961.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 1690794 and 1690803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1690831) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9304 + ... + 9483.

It is an arithmetic number, because the mean of its divisors is an integer number (183183).

2^1690830 is an apocalyptic number.

1690830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1690830 is an abundant number, since it is smaller than the sum of its proper divisors (2705562).

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

1690830 is a wasteful number, since it uses less digits than its factorization.

1690830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18800 (or 18797 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 1690830 is about 1300.3191915834. The cubic root of 1690830 is about 119.1333392275.

The spelling of 1690830 in words is "one million, six hundred ninety thousand, eight hundred thirty".