1690422 has 8 divisors (see below), whose sum is σ = 3380856. Its totient is φ = 563472.

The previous prime is 1690421. The next prime is 1690427. The reversal of 1690422 is 2240961.

It is a sphenic number, since it is the product of 3 distinct primes.

1690422 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 1690392 and 1690401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1690421) 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, 140863 + ... + 140874.

It is an arithmetic number, because the mean of its divisors is an integer number (422607).

2^1690422 is an apocalyptic number.

1690422 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1690422 is a wasteful number, since it uses less digits than its factorization.

1690422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281742.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 1690422 is about 1300.1622975613. The cubic root of 1690422 is about 119.1237561012.

It can be divided in two parts, 1690 and 422, that added together give a palindrome (2112).

The spelling of 1690422 in words is "one million, six hundred ninety thousand, four hundred twenty-two".